判断页面是在pc端还是移动端打开不同的页面

在pc端页面上的判断

    var mobileAgent = new Array("iphone", "ipod", "ipad", "android", "mobile", "blackberry", "webos", "incognito", "webmate", "bada", "nokia", "lg", "ucweb", "skyfire");
    var browser = navigator.userAgent.toLowerCase();
    var isMobile = false;
    for (var i=0; i<mobileAgent.length; i++){ if (browser.indexOf(mobileAgent[i])!=-1){ isMobile = true;
    //alert(mobileAgent[i]);
    location.href = 'index-mobile.html';
    break; } } 

在移动端页面上的判断

        var w = document.documentElement.clientWidth || document.body.clientWidth;
        // alert(w);
        if(w > 640){
            location.href = 'index.html';
        }