var mainActiveObj,mainActiveLi,innerUl;

function checkClick(){
	innerUl = true;
}

function shMenu(obj){
	if(innerUl){
		innerUl = false;
	}else{
		var ulis = obj.getElementsByTagName("UL");					
		if (ulis.length > 0){
			if(mainActiveLi && mainActiveLi != ulis[0])
				mainActiveLi.style.display = "none";
		
			if(ulis[0].style.display == "block")
				ulis[0].style.display = "none";
			else
				ulis[0].style.display = "block";
				mainActiveLi = ulis[0];
		}
	}
}
function changeBg(obj)
{
	if(mainActiveObj)
		mainActiveObj.className = "";
	if(mainActiveObj && mainActiveObj == obj)
	{
		mainActiveObj.className = "";
		mainActiveObj = false;
	}
	else
	{
		obj.className = "mainlinkactive";
		mainActiveObj = obj;
	}
}