var preUlElement = "";
	function toggle(id)
	{
		ul = "ul_" + id;   
		ulElement = document.getElementById(ul);
		
		if(preUlElement != "")
			if(preUlElement != ulElement)			
			preUlElement.className = 'closed';
		
		if (ulElement)
		{
			if (ulElement.className == 'closed')
				ulElement.className = "open";
			else
				ulElement.className = "closed";
		}
		preUlElement = ulElement;
	}// JavaScript Document