/***********************************************
    * Accordion Content script- (c) Dynamic Drive DHTML code library (www.dynamicdrive.com)
    * Visit http://www.dynamicDrive.com for hundreds of DHTML scripts
    * This notice must stay intact for legal use
    ***********************************************/
        
//Accordion Content script: By Dynamic Drive, at http://www.dynamicdrive.com
//Created: Jan 7th, 08'

var ddaccordion={
	
	contentclassname:{}, //object to store corresponding contentclass name based on headerclass

	expandone:function(headerclass, selected){ //PUBLIC function to expand a particular header
		this.toggleone(headerclass, selected, "expand")
	},

	collapseone:function(headerclass, selected){ //PUBLIC function to collapse a particular header
		this.toggleone(headerclass, selected, "collapse")
	},

	expandall:function(headerclass){ //PUBLIC function to expand all headers based on their shared CSS classname
		var $headers=$('.'+headerclass)
		$('.'+this.contentclassname[headerclass]+':hidden').each(function(){
			$headers.eq(parseInt($(this).attr('contentindex'))).click()
		})
	},

	collapseall:function(headerclass)
	{ //PUBLIC function to collapse all headers based on their shared CSS classname
	    if(BrowserSupportsJQuery())
	    {	
		    var $headers=$('.'+headerclass)
		    $('.'+this.contentclassname[headerclass]+':visible').each(function(){
			    $headers.eq(parseInt($(this).attr('contentindex'))).click()
		    })
		}
	},

	toggleone:function(headerclass, selected, optstate)
	{ //PUBLIC function to expand/ collapse a particular header
	    if(BrowserSupportsJQuery())
	    {	    
		    var $targetHeader=$('.'+headerclass).eq(selected)
		    var $subcontent=$('.'+this.contentclassname[headerclass]).eq(selected)
		    if (typeof optstate=="undefined" || optstate=="expand" && $subcontent.is(":hidden") || optstate=="collapse" && $subcontent.is(":visible"))
			    $targetHeader.click()
        }
	},

	expandit:function($targetHeader, $targetContent, config){
		$targetContent.slideDown(config.animatespeed)
		this.transformHeader($targetHeader, config, "expand")
	},

	collapseit:function($targetHeader, $targetContent, config){
		$targetContent.slideUp(config.animatespeed)
		this.transformHeader($targetHeader, config, "collapse")
	},

	transformHeader:function($targetHeader, config, state){
		$targetHeader.addClass((state=="expand")? config.cssclass.expand : config.cssclass.collapse) //alternate btw "expand" and "collapse" CSS classes
		.removeClass((state=="expand")? config.cssclass.collapse : config.cssclass.expand)
		if (config.htmlsetting.location=='src'){ //Change header image (assuming header is an image)?
			$targetHeader=($targetHeader.is("img"))? $targetHeader : $targetHeader.find('img').eq(0) //Set target to either header itself, or first image within header
			$targetHeader.attr('src', (state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse) //change header image
		}
		else if (config.htmlsetting.location=="prefix") //if change "prefix" HTML, locate dynamically added ".accordprefix" span tag and change it
			$targetHeader.find('.accordprefix').html((state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse)
		else if (config.htmlsetting.location=="suffix")
			$targetHeader.find('.accordsuffix').html((state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse)
	},

	getCookie:function(Name){ 
		var re=new RegExp(Name+"=[^;]+", "i") //construct RE to search for target name/value pair
		if (document.cookie.match(re)) //if cookie found
			return document.cookie.match(re)[0].split("=")[1] //return its value
		return null
	},

	setCookie:function(name, value){
		document.cookie = name + "=" + value
	},

	init:function(config)
	{
	    if(BrowserSupportsJQuery())
	    {
	        document.write('<style type="text/css">\n')
	        document.write('.'+config.contentclass+'{display: none}\n') //generate CSS to hide contents
	        document.write('<\/style>')
	        $(document).ready(function(){ddaccordion.initHelper(config)})
	    }
	},
	
	initHelper:function(config)
	{
        ddaccordion.contentclassname[config.headerclass]=config.contentclass //remember contentclass name based on headerclass
        config.cssclass={collapse: config.toggleclass[0], expand: config.toggleclass[1]} //store expand and contract CSS classes as object properties
        config.htmlsetting={location: config.togglehtml[0], collapse: config.togglehtml[1], expand: config.togglehtml[2]} //store HTML settings as object properties
        var lastexpanded={} //object to hold reference to last expanded header and content (jquery objects)
        var expandedindices=(config.persiststate)? ddaccordion.getCookie(config.headerclass) : config.defaultexpanded
        expandedindices=(typeof expandedindices=='string')? expandedindices.replace(/c/ig, '').split(',') : config.defaultexpanded //test for valid cookie ('string'), otherwise (null, or 1st page load), default to defaultexpanded setting
        var $subcontents=$('.'+config["contentclass"])
        if (config["collapseprev"] && expandedindices.length>1)
	        expandedindices=[expandedindices.pop()] //return last array element as an array (for sake of jQuery.inArray())
        $('.'+config["headerclass"]).each(function(index){ //loop through all headers
	        if (/(prefix)|(suffix)/i.test(config.htmlsetting.location) && $(this).html()!=""){ //add a SPAN element to header depending on user setting and if header is a container tag
		        $('<span class="accordprefix"></span>').prependTo(this)
		        $('<span class="accordsuffix"></span>').appendTo(this)
	        }
	        $(this).attr('headerindex', index+'h') //store position of this header relative to its peers
	        $subcontents.eq(index).attr('contentindex', index+'c') //store position of this content relative to its peers
	        var $subcontent=$subcontents.eq(index)
	        if (jQuery.inArray(index, expandedindices)!=-1){ //check for headers that should be expanded automatically
		        if (config.animatedefault==false)
			        $subcontent.show()
		        ddaccordion.expandit($(this), $subcontent, config)
		        lastexpanded={$header:$(this), $content:$subcontent}
	        }  //end check
	        else{
		        $subcontent.hide()
		        ddaccordion.transformHeader($(this), config, "collapse")
	        }
        })
		
        var expandAction = 'click';
        
        // Determine what triggers the expand/collapse menu behaviour (i.e. click or mouse-over)
        if(config.expandonmouseover)
        {
            expandAction = 'mouseover';
		    
            $('.'+config["headerclass"]).mouseover(function(){ //assign behavior when headers are mouse-over on
		            var $subcontent=$subcontents.eq(parseInt($(this).attr('headerindex'))) //get subcontent that should be expanded/collapsed
		            if ($subcontent.css('display')=="none"){
			            ddaccordion.expandit($(this), $subcontent, config)
			            if (config["collapseprev"] && lastexpanded.$header && $(this).get(0)!=lastexpanded.$header.get(0)){ //collapse previous content?
				            ddaccordion.collapseit(lastexpanded.$header, lastexpanded.$content, config)
			            }
			            lastexpanded={$header:$(this), $content:$subcontent}
		            }

		            return false
                }
            )
        }
        else
        {
            $('.'+config["headerclass"]).click(function(){ //assign behavior when headers are clicked on
		            var $subcontent=$subcontents.eq(parseInt($(this).attr('headerindex'))) //get subcontent that should be expanded/collapsed
		            if ($subcontent.css('display')=="none"){
			            ddaccordion.expandit($(this), $subcontent, config)
			            if (config["collapseprev"] && lastexpanded.$header && $(this).get(0)!=lastexpanded.$header.get(0)){ //collapse previous content?
				            ddaccordion.collapseit(lastexpanded.$header, lastexpanded.$content, config)
			            }
			            lastexpanded={$header:$(this), $content:$subcontent}
		            }
		            else
		            {
			            // If Collapse Menu on double click is enabled, 
			            if(config.collapsemenuonsecondclick)
			                ddaccordion.collapseit($(this), $subcontent, config);
                        else
                        {
                            // Otherwise navigatte to the first found link
                            //location.href = $subcontent[0].childNodes[0].childNodes[0].toString();
                             
			                var firstLink = $("#" + $subcontent[0].id + " a:first").attr("href");
			                if(firstLink != null && firstLink != '')
			                    location.href = firstLink;
                        }
		            }
		            return false
                }
            ) 	    
        }
 	    
        $(window).bind('unload', function(){ //clean up and persist on page unload
	        $('.'+config["headerclass"]).unbind(expandAction)
	        var expandedindices=[]
	        $('.'+config["contentclass"]+":visible").each(function(index){ //get indices of expanded headers
		        expandedindices.push($(this).attr('contentindex'))
	        })
	        if (config.persiststate==true){ //persist state?
		        expandedindices=(expandedindices.length==0)? '-1c' : expandedindices //No contents expanded, indicate that with dummy '-1c' value?
		        ddaccordion.setCookie(config.headerclass, expandedindices)
	        }
        })
    }
}