限制网页只能从移动手机端打开不能从电脑浏览器打开（转）
var p = navigator.platform;
var u = navigator.userAgent;
system.win = p.indexOf("Win") == 0;
system.mac = p.indexOf("Mac") == 0;
system.x11 = (p == "X11") || (p.indexOf("Linux") == 0);
if (system.win || system.mac || system.xll) {//如果是PC转
if (u.indexOf('Windows Phone') > -1) { //win手机端
}
else {
window.location.href = "Expires.aspx?error=1";/**这里修改跳转地址 */
}
}