源码包下载地址：http://files.cnblogs.com/files/chenjian/weixinTip-master.zip
相关代码：
<!DOCTYPE html>
<html lang="zh_CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<script type="text/javascript" src="jquery.min.js"></script>
<title>点击下载应用</title>
<style type="text/css">
*{margin:0; padding:0;}
a{text-decoration: none;}
img{max- 100%; height: auto;}
.weixin-tip{display: none; position: fixed; left:0; top:0; bottom:0; background: rgba(0,0,0,0.8); filter:alpha(opacity=80); height: 100%; 100%; z-index: 100;}
.weixin-tip p{text-align: center; margin-top: 10%; padding:0 5%;}
</style>
</head>
<body>
<div class="weixin-tip">
<p>
<img src="live_weixin.png" alt="微信打开"/>
</p>
</div>
<script type="text/javascript">
$(window).on("load",function(){
var winHeight = $(window).height();
function is_weixin() {
var ua = navigator.userAgent.toLowerCase();
if (ua.match(/MicroMessenger/i) == "micromessenger") {
return true;
} else {
return false;
}
}
var isWeixin = is_weixin();
if(isWeixin){
$(".weixin-tip").css("height",winHeight);
$(".weixin-tip").show();
}
})
</script>
</body>
</html>