<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no" />
<title></title>
<style>div{width: 200px;height: 200px;background: #f06;}</style>
</head>
<body>
<div id="download">点击判断设备是iOS还是安卓</div>
<script src="js/jquery.js"></script>
<script>
var download = {
downloadApp : function(){
var xt = navigator.userAgent;
if(xt.indexOf("iPhone") > -1){
window.location.href="http://www.baidu.com";
}else{
window.location.href="http://3g.163.com/touch/all?dataversion=A&version=v_standard";
}
}
};
$(function(){
$("#download").click(function(){
download.downloadApp();
});
})
</script>
</body>
</html>
原文：http://www.cnblogs.com/qianxiaojing/p/6912145.html