IE瀏覽器中無法獲取window.location.origin的解決方法

var origin = window.location.origin;
//判斷orgin是否為undefined,如果是undefined則進行拼接
if (typeof (origin) == "undefined") {
origin = window.location.protocol + "//" + window.location.hostname + (window.location.port ? ':' + window.location.port : '');
}