JS判断手机系统

<script language="javascript">

window.onload = function () {

alert("1");

//alert(navigator.userAgent.indexOf());

var u = navigator.userAgent;

if (u.indexOf('Android') > -1 || u.indexOf('Linux') > -1) {//安卓手机

alert("安卓手机");

// window.location.href = "mobile/index.html";

} else if (u.indexOf('iPhone') > -1) {//苹果手机

// window.location.href = "mobile/index.html";

alert("苹果手机");

} else if (u.indexOf('Windows Phone') > -1) {//winphone手机

alert("winphone手机");

// window.location.href = "mobile/index.html";

}

}

</script>