var toggleF =
{
  init: function()
  {
    var tabs = Core.getElementsByClass("opener");
btn = document.getElementById('btn-dwl');
	btnSrc = btn.src;
    for (var i = 0; i < tabs.length; i++)
    {
            Core.addEventListener(tabs[i], "click", toggleF.clickListener);
		       
    }
  },
 
	clickListener: function(event)
  	{
    	var element = this;
   		var pointerClass = element.rel;
		var target = Core.getElementsByClass(pointerClass);
		
		
		
		
		var btnNewSrc = btnSrc.replace(".gif","-dwn.gif");
		
		var allTags = document.getElementsByTagName("div");
     
	
		for (var i = 0; i < target.length; i++)
    	{
            if (Core.hasClass(target[i], "show")){
					
					Core.removeClass(target[i], "show");
					btn.src = btnSrc;
					
			}
			else
			{
			
				 for (var ii = 0; ii < allTags.length; ii++){
					if (Core.hasClass(allTags[ii], "show")){
						Core.removeClass(allTags[ii], "show");
						btn.src = btnSrc;
		
				}
		 
		 	}
				Core.addClass(target[i], "show");
				btn.src = btnNewSrc;
				
			}
		       
    	}
		
   	return;
      
    }
	
	

};

Core.start(toggleF);