var labthink = { 
//top links
	top_links : function(){
		var lv = document.getElementById("overseas");
		var lvt= document.getElementById("glb");
		if(lv){
			lv.onmouseover= function(){	lvt.style.display = "block"; }
			lvt.onmouseout= function(){	lvt.style.display = "none";	}
			lv.onmouseout= function(){ lvt.style.display = "none"; }
		}
	},
//addEvent
	addEvent: function(elm, evType, fn, useCapture){
		if (elm.addEventListener) 
		{
			elm.addEventListener(evType, fn, useCapture);
			return true;
		} else if (elm.attachEvent) {
			var r = elm.attachEvent('on' + evType, fn);
			return r;
		} else {
			elm['on' + evType] = fn;
		}
	}
} 
labthink.addEvent(window,"load",labthink.top_links,false);