限制网页只能从移动手机端打开不能从电脑浏览器打开

如何限制电脑PC端访问Web页面，只能手机端才能访问

HTML添加JS代码

var system = {};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";}}