/*
        -------------------------------------------------------------------------------------------------------
        Functions:	TTI Frameworks: Framework,Cookie,Dom and animation.
        Overview:	These functions and properties operate the various number of operations.	
        -------------------------------------------------------------------------------------------------------
        History:	Version:	Developer:	Details:
        No Chanages have beeen made
        -------------------------------------------------------------------------------------------------------
        -------------------------------------------------------------------------------------------------------
*/
        //////////// GLOBAL OBJECT Creation
        var Framework = new Object();
        var Cookie = new Object();
        var Dom = new Object();
        var Anim = new Object();     
/*
        -------------------------------------------------------------------------------------------------------
        Properties:	TTI ANIM: Object
        Overview:	These methods are used for animation dom elements
        -------------------------------------------------------------------------------------------------------
*/                
        // Fade In Animation
        Anim.FadeIn = function(id,curropacity,opacityToFade,bHidden)
        {
                StartFade = function (id,curropacity,opacityToFade,bHidden)
                {
                        var opacity = curropacity;
                        if(bHidden)
                        {
                                Framework.$(id).style.display='';
                        }
                        fadeLoop(id, opacity,opacityToFade);
                };
                
                fadeLoop = function (id, opacity,opacityToFade)
                {
                        var object = Framework.$(id);
                        if (opacity <= opacityToFade)
                        {
                                setOpacity(object, opacity);
                                opacity += 10;
                                window.setTimeout("fadeLoop('" + id + "', " + opacity + "," + opacityToFade + ")", 30);
                        }
                        else
                        {
                                ajaxrunning=false;
                        }
                };
                
                setOpacity = function (object, opacity)
                {
                        object.style.filter = "alpha(style=0,opacity:" + opacity + ")";
                        object.style.KHTMLOpacity = opacity / 100;
                        object.style.MozOpacity = opacity / 100;
                        object.style.opacity = opacity / 100;
                };
                
                StartFade (id,curropacity,opacityToFade,bHidden);
        };
        
        // Fade Out Animation
        Framework.FadeOut = function(id,curropacity,opacityToFade,bHide)
        {
                StartFade = function (id,curropacity,opacityToFade,bHide)
                {
                        var opacity = curropacity;
                        fadeLoop(id, opacity,opacityToFade,bHide);
                };
                
                fadeLoop = function (id, opacity,opacityToFade,bHide)
                {
                        var object = Framework.$(id);
                        if (opacity >= opacityToFade)
                        {
                                setOpacity(object, opacity);
                                opacity -= 10;
                                window.setTimeout("FadeIn.fadeLoop('" + id + "', " + opacity + "," + opacityToFade + ","+ bHide +")", 30);
                        }
                        else
                        {
                                if(bHide)
                                {
                                        object.style.display='none';
                                }
                        }
                };
                
                setOpacity = function (object, opacity)
                {
                        object.style.filter = "alpha(style=0,opacity:" + opacity + ")";
                        object.style.KHTMLOpacity = opacity / 100;
                        object.style.MozOpacity = opacity / 100;
                        object.style.opacity = opacity / 100;
                };
                
                StartFade (id,curropacity,opacityToFade,bHidden);
        };
        
/*
        -------------------------------------------------------------------------------------------------------
        Properties:	TTI DOM: Object
        Overview:	These methods are used for interacting with dom elements
        -------------------------------------------------------------------------------------------------------
*/
      
        //Check if a dom element has a class name.
        Dom.hasClassName = function(element, className) 
        {
                var elementClassName = element.className
                return (elementClassName.length > 0 && (elementClassName == className ||
                new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)))
        }
        
        //Add classname to a a dom element.
        Dom.addClassName = function(element, className) 
        {
                if (!this.hasClassName(element, className))
                element.className += (element.className ? ' ' : '') + className
                return element
        }
        
        //Remove classname from a dom element.
        Dom.removeClassName = function(element, className) 
        {
                element.className = element.className.replace(
                new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ')
                return element
        }
        
        // Insert Dom Element
        Dom.addScript = function(id,src)
        {
                var o=document.createElement('script');
                o.id=id;
                o.type="text/javascript";
                o.setAttribute("src",src);
                document.getElementsByTagName('head')[0].appendChild(o);
                return o;
        }
        
        // - Useful for adding dynamtic stylesheets to website
        Dom.addStyle = function(id,src)
        {
                var o=document.createElement('link');
                o.id=id;
                o.setAttribute("type","text/css");
                o.setAttribute("rel","stylesheet");
                o.setAttribute("href",src);
                document.getElementsByTagName('head')[0].appendChild(o);
                return o;
        }
        
/*
        -------------------------------------------------------------------------------------------------------
        Properties:	TTI COOKIE: Object
        Overview:	These methods are used for interacting with cookies.
        -------------------------------------------------------------------------------------------------------
*/
        Cookie.name = null;
        Cookie.value = null;
        Cookie.expires = null;
        
        ////// ERASE COOKIE
        Cookie.Erase = function() 
        {
                if(this.name)
                {
        	       Framework.createCookie(this.name,"",-1);
        	}
        }

        ////// CREATE
        Cookie.Create = function(name,value,days) 
        {
        	if (this.name && this.value) 
                {
        		var date = new Date();
        		date.setTime(date.getTime()+(days*24*60*60*1000));
        		var expires = "; expires="+date.toGMTString();
        	}
        	else var expires = "";
        	document.cookie = name+"="+value+expires+"; path=/";
        }
        
        ////// READ
        Cookie.Read = function(name) 
        {
        	var nameEQ = name + "=";
        	var ca = document.cookie.split(';');
        	for(var i=0;i < ca.length;i++) 
                {
        		var c = ca[i];
        		while (c.charAt(0)==' ') c = c.substring(1,c.length);
        		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        	}
        	return null;
        }
        
/*
        -------------------------------------------------------------------------------------------------------
        Properties:	TTI Framework: Object
        Overview:	These methods perform various useful actions.
        -------------------------------------------------------------------------------------------------------
*/ 

        // Check if Object Exists
        Framework.$defined = function(obj)
        {
	       return (obj != undefined);
        };
        
        // Random Number
        Framework.$random = function(min, max)
        {
                return Math.floor(Math.random() * (max - min + 1) + min);
        }
        
        // Remove Element
        Framework.$remove = function(e)
        {
                if (e)
                {
                        e.parentNode.removeChild(e);
                }                
        };
        
        // Timestamp
        Framework.$timestamp = function()
        {
                return new Date().getTime();
        }

        // Type Discovery
        Framework.$type = function(obj)
        {
                if (!Framework.$defined(obj)) return false;
        	if (obj.htmlElement) return 'element';
        	
        	var type = typeof obj;
        	if (type == 'object' && obj.nodeName)
                {
        		switch(obj.nodeType)
                        {
        			case 1: return 'element';
        			case 3: return (/\S/).test(obj.nodeValue) ? 'textnode' : 'whitespace';
        		}
        	}
        	if (type == 'object' || type == 'function')
                {
        		switch(obj.constructor)
                        {
        			case Array: return 'array';
        			case RegExp: return 'regexp';
        			case Class: return 'class';
        		}
        		if (typeof obj.length == 'number')
                        {
        			if (obj.item) return 'collection';
        			if (obj.callee) return 'arguments';
        		}
        	}
        	return type;
        };
        
        // Clearing Timers/Intervals
        Framework.$clear = function(timer)
        {
        	clearTimeout(timer);
        	clearInterval(timer);
        	return null; 
        }
        
        // Toogle Element
        Framework.Toggle = function(divid)
        {
                if (Framework.$(divid).style.display=='none')
                {
                        Framework.$(divid).style.display='block';
                }
                else
                {
                        Framework.$(divid).style.display='none';
                }
        }
        
        // Document Sizes	
	Framework.getPageScroll = function () 
        {
		var xScroll, yScroll;
		if (self.pageYOffset) 
                {
			yScroll = self.pageYOffset;
			xScroll = self.pageXOffset;
		} else if (document.documentElement && document.documentElement.scrollTop) 
                {	 // Explorer 6 Strict
			yScroll = document.documentElement.scrollTop;
			xScroll = document.documentElement.scrollLeft;
		} else if (document.body) 
                {// all other Explorers
			yScroll = document.body.scrollTop;
			xScroll = document.body.scrollLeft;	
		}
		var arrayPageScroll = {'xScroll':xScroll,'yScroll':yScroll};
		return arrayPageScroll;
	}
	
	// Pagee Sizes	
        Framework.getPageSize = function()
        {
                var xScroll, yScroll;
	
			if (window.innerHeight && window.scrollMaxY) {	
				xScroll = window.innerWidth + window.scrollMaxX;
				yScroll = window.innerHeight + window.scrollMaxY;
			} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
				xScroll = document.body.scrollWidth;
				yScroll = document.body.scrollHeight;
			} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
				xScroll = document.body.offsetWidth;
				yScroll = document.body.offsetHeight;
			}
	
			var windowWidth, windowHeight;
	
			if (self.innerHeight) {	// all except Explorer
				if(document.documentElement.clientWidth){
					windowWidth = document.documentElement.clientWidth; 
				} else {
					windowWidth = self.innerWidth;
				}
				windowHeight = self.innerHeight;
			} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
				windowWidth = document.documentElement.clientWidth;
				windowHeight = document.documentElement.clientHeight;
			} else if (document.body) { // other Explorers
				windowWidth = document.body.clientWidth;
				windowHeight = document.body.clientHeight;
			}	
	
			// for small pages with total height less then height of the viewport
			if(yScroll < windowHeight){
				pageHeight = windowHeight;
			} else { 
				pageHeight = yScroll;
			}
	
	
			// for small pages with total width less then width of the viewport
			if(xScroll < windowWidth){	
				pageWidth = xScroll;		
			} else {
				pageWidth = windowWidth;
			}
			
			//
			var largestWidth;
			var largestHeight;
			var smallestWidth;
			var smallestHeight;
			//
			if ( pageWidth >= windowWidth )
			{	largestWidth = pageWidth; smallestWidth = windowWidth;	}
			else
			{	largestWidth = windowWidth; smallestWidth = pageWidth;	}
			//
			if ( pageHeight >= windowHeight )
			{	largestHeight = pageHeight; smallestHeight = windowHeight;	}
			else
			{	largestHeight = windowHeight; smallestHeight = pageHeight;	}
			
			// Return
			var arrayPageSize = {'pageWidth':pageWidth,'pageHeight':pageHeight,'windowWidth':windowWidth,'windowHeight':windowHeight,'largestWidth':largestWidth,'largestHeight':largestHeight};
			return arrayPageSize;
        }
        
        // Toggle Scrollbar	
        Framework.ToggleScrollbar = function()
        {
                if (Dom.hasClassName(document.getElementsByTagName('html')[0], 'dialog-open'))
                {
                       Dom.removeClassName(document.getElementsByTagName('html')[0], 'dialog-open');
                }
                else
                {
                       Dom.addClassName(document.getElementsByTagName('html')[0], 'dialog-open');
                }
        }
        
        // Set Scrolling Height
        Framework.setScrollTop = function(value) 
        {
                var body = document.documentElement ? document.documentElement : document.body;
                body.scrollTop = value;
        }
                  
        // Check if property of an object is defined
        // - useful for discoverying if an property of an object exists!
        Framework.isDefined = function(object, variable)
        {
                return (typeof(eval(object)[variable]) != 'undefined');
        }

        // References
        // - References an Element!
        Framework.$ = function(el) 
        {
          var elements = new Array();
          for (var i = 0; i < arguments.length; i++) {
            var element = arguments[i];
            if (typeof element == 'string')
              element = document.getElementById(element);
            if (arguments.length == 1)
              return element;
            elements.push(element);
          }
          return elements;
        };
        
        // Ajax Calls
        Framework.Ajax = function() 
        {
            var that=this; 
            that.page = "";
            that.parameters = "";  
            that.method = "";
            this.updating = false;
            
            //Abort Ajax
            this.abort = function() 
            {
                      if (that.updating)
                       {
                                that.updating=false;
                                that.AJAX.abort();
                                that.AJAX=null;
                      }
            }
            
            //Send Ajax
            this.Call = function() 
            { 
                      if (that.updating) 
                      { 
                                return false; 
                      }
                      that.AJAX = null;  
                                              
                      if (window.XMLHttpRequest) 
                      {              
                                that.AJAX=new XMLHttpRequest();              
                      } 
                      else 
                      {                                  
                                that.AJAX=new ActiveXObject("Microsoft.XMLHTTP");
                      }  
                      
                      //If the ajax object could not be created                                           
                      if (that.AJAX==null) 
                      {                             
                                return false;                               
                      } 
                      else 
                      {
                      
                        //Ajax object created :)
                        that.AJAX.onreadystatechange = function()
                        {  
                                  if (that.AJAX.readyState==4) 
                                  {             
                                                that.updating=false;                
                                                if (that.AJAX.readyState==4) 
                                                {
                                                        that.callback(that.AJAX.responseText,that.AJAX.status,that.AJAX.responseXML);

                                                        that.updating=false; 
                                                        that.AJAX=null;
                                                }   
                                                that.AJAX=null;                                         
                                  }                                                      
                        }    
                                                                            
                        that.updating = new Date();                              
                        if (that.method == "post") 
                        {
                                  var uri=""+that.page+"?cache="+that.updating.getTime()+"";
                                  that.AJAX.open("POST", uri, true);
                                  that.AJAX.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
                                  that.AJAX.setRequestHeader("Content-Length", that.parameters.length);
                                  that.AJAX.send(that.parameters);
                        } 
                        else 
                        {
                                  var uri=""+that.page+"?"+that.parameters+"&cache="+that.updating.getTime()+"";
                                  that.AJAX.open("GET", uri, true);                             
                                  that.AJAX.send(null);                                         
                        }              
                        return true;                                             
                      }                                                                           
            }
            
                this.callback = function ()
                {
                        
                };   
          }
        
        // Match String in Text
        // - Finds any regex patterns in the string
        Framework.matchReg = function(value,regx)
        {
                var re = new RegExp(regx);
                var m = re.exec(value);
                if (m == null)
                {
                        return;
                }
                else
                {
                        return(m);
                }
        };
        
        // Replace Text
        // - Replace Text with Regex Pattern!
        Framework.replaceReg = function(value,regx,withstr)
        {
                var re = new RegExp(regx, "g");
                return value.replace(re, withstr);
        };
        
        Framework.leftTrim = function(sString)
        {
                while (sString.substring(0,1) == ' ')
                {
                        sString = sString.substring(1, sString.length);
                }
                return sString;
        }
        
        Framework.rightTrim = function(sString)
        {
                while (sString.substring(sString.length-1, sString.length) == ' ')
                {
                        sString = sString.substring(0,sString.length-1);
                }
                return sString;
        }
        
        Framework.trimAll = function(sString)
        {
                while (sString.substring(0,1) == ' ')
                {
                        sString = sString.substring(1, sString.length);
                }
                while (sString.substring(sString.length-1, sString.length) == ' ')
                {
                        sString = sString.substring(0,sString.length-1);
                }
                return sString;
        }
/*
        -------------------------------------------------------------------------------------------------------
        Properties:	TTI Overlay: Top
        Overview:	These methods are used for interacting with the overlay
        -------------------------------------------------------------------------------------------------------
*/

        function ToggleLabs()
        {
                if (jQuery("#topOverlay").css('display') == 'block')
                        {
                                jQuery("#topOverlay").slideUp("fast",function (){
                                        jQuery("#topOverlayContent").css({"display":"none" }); 
                                });     
                        }
                        else
                        {
                                jQuery("#topOverlay").slideDown("fast", function (){
                                        jQuery("#topOverlayContent").css({"display":"block" }); 
                                });  
                        }    
                
        }

/*
        -------------------------------------------------------------------------------------------------------
        Properties:	TTI Overlay: object
        Overview:	These methods are used for generating the overlay
        -------------------------------------------------------------------------------------------------------
*/
        //main object of the overlay
        function Overlay(id)
        {
                this.width = "";
                this.height = "";
                this.html = "";
                this.className = "";
                this.fade = "";
                
                //div refernece
                this.div = null;
        }
        
        //Method for inserting html content into the overlay
        Overlay.prototype.InsertContent = function(inHTML)
        {
                if (this.div)
                {
                        this.div.innerHTML = inHTML;
                }
        }      
        
        //Method for generating the overaly
        Overlay.prototype.Generate = function()
        {
                var pageSize = Framework.getPageSize();
                h2 = pageSize.pageHeight;
                w2 = pageSize.pageWidth;

                //Check if the overlay div has been created
                var light = Framework.$('lightScreenObject');
                if (!light) 
                {
                        var tbody = document.getElementsByTagName("body")[0];
                        var tnode = document.createElement('div');                
                                            
                        tnode.style.position='absolute';                
                        tnode.style.top='0px';                          
                        tnode.style.left='0px';          
                        //tnode.onclick = function (){ CloseOverlay() };               
                        tnode.style.overflow='hidden';                        
                        tnode.style.zIndex='100';       
                        tnode.style.display='block';                   
                        tnode.id='lightScreenObject';  
                        tnode.style.height = ""+h2+"px";  
                        tnode.style.width = ""+w2+"px"; 
                        tbody.appendChild(tnode);   
                }
                
                //Create popup
                this.div = Framework.$('blueOverlay');
                if (!this.div) 
                {
                        var tbody = document.getElementsByTagName("body")[0];
                        var tnode = document.createElement('div');         
                        tnode.className= this.className;                           
                        tnode.id='blueOverlay';     
                        tnode.style.textAlign="center";              
                        tnode.style.display='none';  
                        tnode.style.height = ""+this.height+"px";  
                        tnode.style.width = ""+this.width+"px";                       
                        tbody.appendChild(tnode);   
                        this.div = tnode;
                }
                                
                this.div.style.left = 50 + "%";
                this.div.style.top = 50 + "%";
                
                w = this.width;
                h = this.height;
                this.div.style.height = h + "px";
                
                var arrPageData = Framework.getPageScroll();
                xpos = arrPageData.xScroll;
                ypos = arrPageData.yScroll;
                
                this.div.style.marginTop = ypos + (-1 * (h/2)) + "px";
                this.div.style.marginLeft = xpos + (-1 * (w/2)) + "px";
                this.div.style.marginTop = (-1 * (h/2)) + "px";
                
                Framework.$('blueOverlay').style.display='block'; 
                Framework.$('lightScreenObject').style.display='block'; 
                
                Framework.ToggleScrollbar(); // Hide Scrollbar	  
        }
  
  
  /*
        -------------------------------------------------------------------------------------------------------
        Functions:	Below is a group of TTI Libruary Functions
        Overview:	These functions allow the operation of removing, striping and cleaning up strings!	
        -------------------------------------------------------------------------------------------------------
        History:	Version:	Developer:	Details:
        No Chanages have beeen made
        -------------------------------------------------------------------------------------------------------
        Improvments to be carried out:
        Setup an ERROR Handler Method for error trapping the content on the site.
        -------------------------------------------------------------------------------------------------------
*/   
    
        String.prototype.stripTags = function ()
        {
                return this.replace(/<([^>]+)>/g,'');
        }
        String.prototype.stripHTML = function ()
        {
                return this.replace(/<[^>]*>/g,"");
        }
        String.prototype.htmlEntities = function ()
        {
                return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
        };
        String.prototype.trim = function()
        {
                return this.replace(/^\s+|\s+$/g,"");
        }
        String.prototype.ltrim = function()
        {
                return this.replace(/^\s+/g,"");
        }
        String.prototype.rtrim = function()
        {
                return this.replace(/\s+$/g,"");
        }
        String.prototype.frmTextArea = function()
        {
                checkval = this.replace(/\r\n/g,"<br />");
                checkval = checkval.replace(/\r/g,"<br />");
                return checkval.replace(/\n/g,"<br />");
        }
        String.prototype.toTextArea = function()
        {
                checkval = this.replace(/\r\n/g,"\r\n");
                checkval = checkval.replace(/\r/g,"\r");
                return checkval.replace(/\n/g,"\n");
        }
        function text2html(txt)
        {
                txt = txt.replace(/\&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/\n/g, "<br>");
                return txt;
        }
        function html2text(html)
        {
                html = html.replace(/<br>/g,"\n").replace(/&amp;/g,"&").replace(/&lt;/g,"<").replace(/&gt;/g,">");
                return html;
        }
        String.prototype.addSlashes = function()
        {
                return this.replace(/\\/g,'\\\\').replace(/\"/g,"\\\"").replace(/\'/g,"\\\'");
        }
        String.prototype.stripSlashes = function()
        {
                return this.replace(/\\'/g,'\'').replace(/\\"/g,'"').replace(/\\\\/g,'\\');
        }
        String.prototype.wordWrap = function(w)
        {
                var i, j, s, r = this.split("\n");
                if(w > 0) for(i in r)
                {
                        for(s = r[i], r[i] = ""; s.length > w;
                        r[i] += s.substr(0, w) + ((s = s.substr(w)).length ? "&shy;" : "")
                        );
                        r[i] += s;
                }
                return r.join("\n");
        }
        String.prototype.jsEscape = function()
        {
                return this.replace(/\%/g, "%jcp").replace(/\n/g, "%jcn").replace(/\r/g, "%jcr").replace(/"/g, "%jcqq").replace(/'/g, "%jcq").replace(/\\/g, "%jcbs");
        }
        String.prototype.jsUnescape = function()
        {
                return this.replace(/\%jcr/g, " ").replace(/\%jcn/g, "\n").replace(/\%jcqq/g, "\"").replace(/\%jcq/g, "'").replace(/\%jcbs/g, "\\").replace(/\%jcp/g, "%");
        }
        Array.prototype.remove=function(s){
          for(i=0;i<this .length;i++){
            if(s==this[i]) this.splice(i, 1);
          }
        }

        var isNumeric = function(x)
        {
                var RegExp = /^(-)?(\d*)(\.?)(\d*)$/;
                return String(x).match(RegExp);
        }
        
        /* Json */
        /*
    http://www.JSON.org/json2.js
    2008-03-24

    Public Domain.

    NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.

    See http://www.JSON.org/js.html

    This file creates a global JSON object containing three methods: stringify,
    parse, and quote.


        JSON.stringify(value, replacer, space)
            value       any JavaScript value, usually an object or array.

            replacer    an optional parameter that determines how object
                        values are stringified for objects without a toJSON
                        method. It can be a function or an array.

            space       an optional parameter that specifies the indentation
                        of nested structures. If it is omitted, the text will
                        be packed without extra whitespace. If it is a number,
                        it will specify the number of spaces to indent at each
                        level. If it is a string (such as '\t'), it contains the
                        characters used to indent at each level.

            This method produces a JSON text from a JavaScript value.

            When an object value is found, if the object contains a toJSON
            method, its toJSON method will be called and the result will be
            stringified. A toJSON method does not serialize: it returns the
            value represented by the name/value pair that should be serialized,
            or undefined if nothing should be serialized. The toJSON method will
            be passed the key associated with the value, and this will be bound
            to the object holding the key.

            This is the toJSON method added to Dates:

                function toJSON(key) {
                    return this.getUTCFullYear()   + '-' +
                         f(this.getUTCMonth() + 1) + '-' +
                         f(this.getUTCDate())      + 'T' +
                         f(this.getUTCHours())     + ':' +
                         f(this.getUTCMinutes())   + ':' +
                         f(this.getUTCSeconds())   + 'Z';
                }

            You can provide an optional replacer method. It will be passed the
            key and value of each member, with this bound to the containing
            object. The value that is returned from your method will be
            serialized. If your method returns undefined, then the member will
            be excluded from the serialization.

            If no replacer parameter is provided, then a default replacer
            will be used:

                function replacer(key, value) {
                    return Object.hasOwnProperty.call(this, key) ?
                        value : undefined;
                }

            The default replacer is passed the key and value for each item in
            the structure. It excludes inherited members.

            If the replacer parameter is an array, then it will be used to
            select the members to be serialized. It filters the results such
            that only members with keys listed in the replacer array are
            stringified.

            Values that do not have JSON representaions, such as undefined or
            functions, will not be serialized. Such values in objects will be
            dropped; in arrays they will be replaced with null. You can use
            a replacer function to replace those with JSON values.
            JSON.stringify(undefined) returns undefined.

            The optional space parameter produces a stringification of the value
            that is filled with line breaks and indentation to make it easier to
            read.

            If the space parameter is a non-empty string, then that string will
            be used for indentation. If the space parameter is a number, then
            then indentation will be that many spaces.

            Example:

            text = JSON.stringify(['e', {pluribus: 'unum'}]);
            // text is '["e",{"pluribus":"unum"}]'


            text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
            // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'


        JSON.parse(text, reviver)
            This method parses a JSON text to produce an object or array.
            It can throw a SyntaxError exception.

            The optional reviver parameter is a function that can filter and
            transform the results. It receives each of the keys and values,
            and its return value is used instead of the original value.
            If it returns what it received, then the structure is not modified.
            If it returns undefined then the member is deleted.

            Example:

            // Parse the text. Values that look like ISO date strings will
            // be converted to Date objects.

            myData = JSON.parse(text, function (key, value) {
                var a;
                if (typeof value === 'string') {
                    a =
/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
                    if (a) {
                        return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
                            +a[5], +a[6]));
                    }
                }
                return value;
            });


        JSON.quote(text)
            This method wraps a string in quotes, escaping some characters
            as needed.


    This is a reference implementation. You are free to copy, modify, or
    redistribute.

    USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD THIRD PARTY
    CODE INTO YOUR PAGES.
*/

/*jslint regexp: true, forin: true, evil: true */

/*global JSON */

/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
    call, charCodeAt, floor, getUTCDate, getUTCFullYear, getUTCHours,
    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join, length,
    parse, propertyIsEnumerable, prototype, push, quote, replace, stringify,
    test, toJSON, toString
*/

if (!this.JSON) {

// Create a JSON object only if one does not already exist. We create the
// object in a closure to avoid global variables.

    JSON = function () {

        function f(n) {    // Format integers to have at least two digits.
            return n < 10 ? '0' + n : n;
        }

        Date.prototype.toJSON = function () {

// Eventually, this method will be based on the date.toISOString method.

            return this.getUTCFullYear()   + '-' +
                 f(this.getUTCMonth() + 1) + '-' +
                 f(this.getUTCDate())      + 'T' +
                 f(this.getUTCHours())     + ':' +
                 f(this.getUTCMinutes())   + ':' +
                 f(this.getUTCSeconds())   + 'Z';
        };


        var escapeable = /["\\\x00-\x1f\x7f-\x9f]/g,
            gap,
            indent,
            meta = {    // table of character substitutions
                '\b': '\\b',
                '\t': '\\t',
                '\n': '\\n',
                '\f': '\\f',
                '\r': '\\r',
                '"' : '\\"',
                '\\': '\\\\'
            },
            rep;


        function quote(string) {

// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.

            return escapeable.test(string) ?
                '"' + string.replace(escapeable, function (a) {
                    var c = meta[a];
                    if (typeof c === 'string') {
                        return c;
                    }
                    c = a.charCodeAt();
                    return '\\u00' + Math.floor(c / 16).toString(16) +
                                               (c % 16).toString(16);
                }) + '"' :
                '"' + string + '"';
        }


        function str(key, holder) {

// Produce a string from holder[key].

            var i,          // The loop counter.
                k,          // The member key.
                v,          // The member value.
                length,
                mind = gap,
                partial,
                value = holder[key];

// If the value has a toJSON method, call it to obtain a replacement value.

            if (value && typeof value === 'object' &&
                    typeof value.toJSON === 'function') {
                value = value.toJSON(key);
            }

// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.

            if (typeof rep === 'function') {
                value = rep.call(holder, key, value);
            }

// What happens next depends on the value's type.

            switch (typeof value) {
            case 'string':
                return quote(value);

            case 'number':

// JSON numbers must be finite. Encode non-finite numbers as null.

                return isFinite(value) ? String(value) : 'null';

            case 'boolean':
            case 'null':

// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce 'null'. The case is included here in
// the remote chance that this gets fixed someday.

                return String(value);

// If the type is 'object', we might be dealing with an object or an array or
// null.

            case 'object':

// Due to a specification blunder in ECMAScript, typeof null is 'object',
// so watch out for that case.

                if (!value) {
                    return 'null';
                }

// Make an array to hold the partial results of stringifying this object value.

                gap += indent;
                partial = [];

// If the object has a dontEnum length property, we'll treat it as an array.

                if (typeof value.length === 'number' &&
                        !(value.propertyIsEnumerable('length'))) {

// The object is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.

                    length = value.length;
                    for (i = 0; i < length; i += 1) {
                        partial[i] = str(i, value) || 'null';
                    }

// Join all of the elements together, separated with commas, and wrap them in
// brackets.

                    v = partial.length === 0 ? '[]' :
                        gap ? '[\n' + gap + partial.join(',\n' + gap) +
                                  '\n' + mind + ']' :
                              '[' + partial.join(',') + ']';
                    gap = mind;
                    return v;
                }

// If the replacer is an array, use it to select the members to be stringified.

                if (typeof rep === 'object') {
                    length = rep.length;
                    for (i = 0; i < length; i += 1) {
                        k = rep[i];
                        if (typeof k === 'string') {
                            v = str(k, value, rep);
                            if (v) {
                                partial.push(quote(k) + (gap ? ': ' : ':') + v);
                            }
                        }
                    }
                } else {

// Otherwise, iterate through all of the keys in the object.

                    for (k in value) {
                        v = str(k, value, rep);
                        if (v) {
                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
                        }
                    }
                }

// Join all of the member texts together, separated with commas,
// and wrap them in braces.

                v = partial.length === 0 ? '{}' :
                    gap ? '{\n' + gap + partial.join(',\n' + gap) +
                              '\n' + mind + '}' :
                          '{' + partial.join(',') + '}';
                gap = mind;
                return v;
            }
        }


// Return the JSON object containing the stringify, parse, and quote methods.

        return {
            stringify: function (value, replacer, space) {

// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.

                var i;
                gap = '';
                indent = '';
                if (space) {

// If the space parameter is a number, make an indent string containing that
// many spaces.

                    if (typeof space === 'number') {
                        for (i = 0; i < space; i += 1) {
                            indent += ' ';
                        }

// If the space parameter is a string, it will be used as the indent string.

                    } else if (typeof space === 'string') {
                        indent = space;
                    }
                }

// If there is no replacer parameter, use the default replacer.

                if (!replacer) {
                    rep = function (key, value) {
                        if (!Object.hasOwnProperty.call(this, key)) {
                            return undefined;
                        }
                        return value;
                    };

// The replacer can be a function or an array. Otherwise, throw an error.

                } else if (typeof replacer === 'function' ||
                        (typeof replacer === 'object' &&
                         typeof replacer.length === 'number')) {
                    rep = replacer;
                } else {
                    throw new Error('JSON.stringify');
                }

// Make a fake root object containing our value under the key of ''.
// Return the result of stringifying the value.

                return str('', {'': value});
            },


            parse: function (text, reviver) {

// The parse method takes a text and an optional reviver function, and returns
// a JavaScript value if the text is a valid JSON text.

                var j;

                function walk(holder, key) {

// The walk method is used to recursively walk the resulting structure so
// that modifications can be made.

                    var k, v, value = holder[key];
                    if (value && typeof value === 'object') {
                        for (k in value) {
                            if (Object.hasOwnProperty.call(value, k)) {
                                v = walk(value, k);
                                if (v !== undefined) {
                                    value[k] = v;
                                } else {
                                    delete value[k];
                                }
                            }
                        }
                    }
                    return reviver.call(holder, key, value);
                }


// Parsing happens in three stages. In the first stage, we run the text against
// regular expressions that look for non-JSON patterns. We are especially
// concerned with '()' and 'new' because they can cause invocation, and '='
// because it can cause mutation. But just to be safe, we want to reject all
// unexpected forms.

// We split the first stage into 4 regexp operations in order to work around
// crippling inefficiencies in IE's and Safari's regexp engines. First we
// replace all backslash pairs with '@' (a non-JSON character). Second, we
// replace all simple value tokens with ']' characters. Third, we delete all
// open brackets that follow a colon or comma or that begin the text. Finally,
// we look to see that the remaining characters are only whitespace or ']' or
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.

                if (/^[\],:{}\s]*$/.test(text.replace(/\\["\\\/bfnrtu]/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

// In the second stage we use the eval function to compile the text into a
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
// in JavaScript: it can begin a block or an object literal. We wrap the text
// in parens to eliminate the ambiguity.

                    j = eval('(' + text + ')');

// In the optional third stage, we recursively walk the new structure, passing
// each name/value pair to a reviver function for possible transformation.

                    return typeof reviver === 'function' ?
                        walk({'': j}, '') : j;
                }

// If the text is not JSON parseable, then a SyntaxError is thrown.

                throw new SyntaxError('JSON.parse');
            },

            quote: quote
        };
    }();
}