记录下，以备将来用到
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题页</title>
<script type="text/javascript" src="jquery-1.4.2.min.js" ></script>
<script type="text/javascript">
function ShowTip(event,obj,message)
{
var xOffset = -10; // x distance from mouse
var yOffset = 10; // y distance from mouse
//obj.style.top = (event.clientX + yOffset)+"px";
//obj.style.left = (event.clientY + xOffset)+"px";
//获取元素width: $(obj).width();
//获取元素height：$(obj).height()
//获取元素位置：$(obj).position().top和$(obj).offset().top
$(‘body‘).append( ‘<div id="tipmessage">‘+message+‘</div>‘);
$(‘div#tipmessage‘).css("top", $(obj).position().top+$(obj).height() + "px").css("left", $(obj).position().left+"px").fadeIn("slow");
}
function HideTip()
{
$("div#tipmessage").fadeOut("slow").remove();
}
</script>
<style type="text/css">
#tipmessage
{
display:none;
z-index:1000;
border:1px solid #448833;
position:absolute;
background:#ffffff;
max-width:200px;
max-height:30px;
padding:5px 10px;
}
</style>
</head>
<body>
<a href="#" onmouseover="ShowTip(event,this,‘欢迎访问脚本之家‘)" onmouseout="HideTip()">Tip</a>
</body>
</html>