jquery鼠标放上去显示悬浮层即弹出定位的div层

<script language="javascript" src="jquery-1.4.2.min.js"></script> 
<script> 
function show(obj,id) { 
var objDiv = $("#"+id+""); 
$(objDiv).css("display","block"); 
$(objDiv).css("left", event.clientX); 
$(objDiv).css("top", event.clientY + 10); 
} 
function hide(obj,id) { 
var objDiv = $("#"+id+""); 
$(objDiv).css("display", "none"); 
} 
</script> 

<!--http://www.ablanxue.com/prone_3421_1.html--> 

<div id="mydiv1" style="position:absolute;display:none;border:1px solid silver;background:silver;"> 
提示1效果 
</div> 
<div id="mydiv2" style="position:absolute;display:none;border:1px solid silver;background:silver;"> 
提示2效果 
</div> 

<a id="t1" onMouseOver="javascript:show(this,'mydiv1');" onMouseOut="hide(this,'mydiv1')">鼠标放上去1</a> 
<br><br><br><br><br> 
<a id="t2" onMouseOver="javascript:show(this,'mydiv2');" onMouseOut="hide(this,'mydiv2')">鼠标放上去2</a>