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>