var select_obj;
function layerMenu(user_id, status){
	var obj=document.all[user_id];
	var _tmpx,_tmpy, marginx, marginy;
	_tmpx = event.clientX + parseInt(obj.offsetWidth);
	_tmpy = event.clientY + parseInt(obj.offsetHeight);
	_marginx = document.body.clientWidth - _tmpx;
	_marginy = document.body.clientHeight - _tmpy ;

	obj.style.posLeft = event.clientX;
	obj.style.posTop = event.clientY;

	if(status=='visible') {
		if(select_obj) {
			select_obj.style.visibility='hidden';
			select_obj=null;
		}
		select_obj=obj;
	}else{
		select_obj=null;
	}
	obj.style.visibility=status; 
}