js判断访问设备

iswap();
function iswap() {
    var uA = navigator.userAgent.toLowerCase();
    var ipad = uA.match(/ipad/i) == "ipad";
    var iphone = uA.match(/iphone os/i) == "iphone os";
    var midp = uA.match(/midp/i) == "midp";
    var uc7 = uA.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
    var uc = uA.match(/ucweb/i) == "ucweb";
    var android = uA.match(/android/i) == "android";
    var windowsce = uA.match(/windows ce/i) == "windows ce";
    var windowsmd = uA.match(/windows mobile/i) == "windows mobile"; 
    if (!(ipad || iphone || midp || uc7 || uc || android || windowsce || windowsmd)) {
        // PC 端
    }else{
        // 移动端
    }
}