var beforenode = "";
	function changemenu(tmid){
		
	try{	
		var tag = document.getElementById(tmid);
		
		if(beforenode!=""){
				var befor = document.getElementById(beforenode);
				befor.className='init';
			}	
			beforenode = tmid;
		tag.className='down';
		
	}catch(e){
		alert(e.message);
		}
	}