/* Horizontal Accordion script
 Created: Oct 27th, 2009. This notice must stay intact for usage 
 Author: Dynamic Drive at http://www.dynamicdrive.com/
 Visit http://www.dynamicdrive.com/ for full source code */
/* Horizontal Accordion script
* Created: Oct 27th, 2009. This notice must stay intact for usage 
* Author: Dynamic Drive at http://www.dynamicdrive.com/
* Visit http://www.dynamicdrive.com/ for full source code
*/

var haccordion={
	//customize loading message if accordion markup is fetched via Ajax:
	ajaxloadingmsg: '<div style="margin: 1em; font-weight: bold"><img src="/images/ico_med_loading.gif" style="vertical-align: middle" /></div>',

	accordioninfo: {}, //class that holds config information of each haccordion instance

	expandli:function(accordionid, targetli){
		var config=haccordion.accordioninfo[accordionid];
		var $targetli=(typeof targetli=="number")? config.$targetlis.eq(targetli) : (typeof targetli=="string")? jQuery('#'+targetli) : jQuery(targetli);
		if (typeof config.$lastexpanded!="undefined"){ //targetli may be an index, ID string, or DOM reference to LI
			config.$lastexpanded.stop().animate({width:config.paneldimensions.peekw}, config.speed); //contract last opened content
		}
		$targetli.stop().animate({width:$targetli.data('hpaneloffsetw')}, config.speed); //expand current content
		config.$lastexpanded=$targetli;
	},


	urlparamselect:function(accordionid){
		var result=window.location.search.match(new RegExp(accordionid+"=(\\d+)", "i")); //check for "?accordionid=index" in URL
		if (result!=null){
			result=parseInt(RegExp.$1)+"";//return value as string so 0 doesn't test for false
		}
		return result; //returns null or index, where index is the desired selected hcontent index
	},

	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 + "; path=/";
	},


	loadexternal:function($, config){ //function to fetch external page containing the entire accordion content markup
		var $hcontainer=$('#'+config.ajaxsource.container).html(this.ajaxloadingmsg);
		$.ajax({
			url: config.ajaxsource.path, //path to external content
			async: true,
			error:function(ajaxrequest){
				$hcontainer.html('Error fetching content.<br />Server Response: '+ajaxrequest.responseText);
			},
			success:function(content){
				$hcontainer.html(content);
				haccordion.init($, config);
			}
		})
	},


	init:function($, config){
			haccordion.accordioninfo[config.accordionid]=config; //cache config info for this accordion
			var $targetlis=$('#'+config.accordionid).find('ul:eq(0) > li'); //find top level LIs
			config.$targetlis=$targetlis;
			config.selectedli=config.selectedli || []; //set default selectedli option
			config.speed=config.speed || "normal"; //set default speed
			$targetlis.each(function(i){
				var $target=$(this).data('pos', i); //give each li an index #
				$target.data('hpaneloffsetw', $target.find('.hpanel:eq(0)').outerWidth()); //get offset width of each .hpanel DIV (config.dimensions.fullw + any DIV padding)
				$target.click(function(){
						haccordion.expandli(config.accordionid, this);
					config.$lastexpanded=$(this);
				})
				if (config.collapsecurrent){ //if previous content should be contracted when expanding current
					$target.mouseleave(function(){
						$(this).stop().animate({width:config.paneldimensions.peekw}, config.speed); //contract previous content
					})
				}				
			}) //end $targetlis.each
			var selectedli=haccordion.urlparamselect(config.accordionid) || ((config.selectedli[1] && haccordion.getCookie(config.accordionid))? parseInt(haccordion.getCookie(config.accordionid)) : config.selectedli[0]);
			selectedli=parseInt(selectedli);
			if (selectedli>=0 && selectedli<config.$targetlis.length){ //if selectedli index is within range
				config.$lastexpanded=$targetlis.eq(selectedli);
				config.$lastexpanded.css('width', config.$lastexpanded.data('hpaneloffsetw')); //expand selected li
			}
			$(window).bind('unload', function(){ //clean up and persist on page unload
				haccordion.uninit($, config);
			}) //end window.onunload
	},

	uninit:function($, config){
		var $targetlis=config.$targetlis;
		var expandedliindex=-1; //index of expanded content to remember (-1 indicates non)
		$targetlis.each(function(){
			var $target=$(this);
			$target.unbind();
			if ($target.width()==$target.data('hpaneloffsetw'))
				expandedliindex=$target.data('pos');
		})
		if (config.selectedli[1]==true) //enable persistence?
			haccordion.setCookie(config.accordionid, expandedliindex);
	},

	setup:function(config){
		//Use JS to write out CSS that sets up initial dimensions of each LI, for JS enabled browsers only
		document.write('<style type="text/css">\n');
		document.write('#'+config.accordionid+' li{width: '+config.paneldimensions.peekw+';\nheight: '+config.paneldimensions.h+';\n}\n');
		document.write('#'+config.accordionid+' li .hpanel{width: '+config.paneldimensions.fullw+';\nheight: '+config.paneldimensions.h+';\n}\n');
		document.write('<\/style>');
		jQuery(document).ready(function($){ //on Dom load
			if (config.ajaxsource){ //if config.ajaxsource option defined
				haccordion.loadexternal($, config);
			}
			else{
				haccordion.init($, config);
			}
		}) //end DOM load
	}

}