<script language="javascript" type="text/javascript">
$(function() {
$("#upLower").mousemove(function() {
$("#toolTip").css({ top: event.clientY + 5, left: event.clientX + 10 });//event.clientY 鼠标所在的坐标的Y轴
});
})
</script>
<div id="toolTip" style="width:120px;"></div>
//跟随鼠标移动的层
<li id="upLower"> //在其上触发onmousemove事件
</li>
转载于:https://www.cnblogs.com/wangergo/archive/2009/06/20/1507364.html