var isDOM = (document.getElementById ? true : false); 
var isIE4 = ((document.all && !isDOM) ? true : false);
var isNS4 = (document.layers ? true : false);

function getRef(id)	{
	if (isDOM) return document.getElementById(id);
	if (isIE4) return document.all[id];
	if (isNS4) return document.layers[id];
}

function ChangheMenuState(id)	{
	var el=getRef("left_menu_level_"+id);
	var img=getRef("limg"+id);
	if(el==null||img==null)
	{
		alert(id);
		alert("Please Refresh");
		return;
	}
	var nclass=el.className.replace('lclose','');
	if(el.className==nclass)
	{
		el.style.display="none";
		nclass+="lclose";
		img.src=img.src.replace('minus','plus');			
	}	
	else	
	{
		el.style.display="block";
		img.src=img.src.replace('plus','minus');
	}
	el.className=nclass;
}