js检测当前设备是移动端还是PC端

加上下面js即可

硬核判断：

<script type="text/javascript">
    //平台、设备和操作系统
    var system ={
        win : false,
        mac : false,
        xll : false
    };
    //检测平台
    var p = navigator.platform;
    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){
        //PC端
        alert('现在是电脑');
    }else{
        //移动端跳转的链接
        alert('现在是手机');
    }
</script>

宽松判断：

<script>
var sUserAgent = navigator.userAgent.toLowerCase();
        var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
        var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";
        var bIsMidp = sUserAgent.match(/midp/i) == "midp";
        var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
        var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";
        var bIsAndroid = sUserAgent.match(/android/i) == "android";
        var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";
        var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";
        if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) {
            location.href  = 'http://qiweixcx.com/phone';
        }
</script>