<html>
<head>
<script type="text/javascript">
function showImg(){
document.getElementById("wxImg").style.display='block';
}
function hideImg(){
document.getElementById("wxImg").style.display='none';
}
</script>
</head>
<body>
<a href="javascript:void(0)" onMouseOut="hideImg()" onmouseover="showImg()">测试</a>
<div id="wxImg" style="display:none;height:50px;back-ground:#f00;position:absolute;">这里是微信图片</div>
</body>
</html>