JavaScript 判斷是PC端仍是移動端

function IsPC() {

    var userAgentInfo = navigator.userAgent;

    var Agents = ["Android", "iPhone",

                "SymbianOS", "Windows Phone",

                "iPad", "iPod"];

    var flag = true;

    for (var v = 0; v < Agents.length; v++) {

        if (userAgentInfo.indexOf(Agents[v]) > 0) {

            flag = false;

            break;

        }

    }

    return flag;

}