location.origin兼容IE

if (window["context"] == undefined) {
    if (!window.location.origin) {
        window.location.origin = window.location.protocol + "//" + window.location.hostname + (window.location.port ? ':' + window.location.port: '');
    }
    window["context"] = location.origin+"/V6.0";
}

 if (!window.location.origin) {
        window.location.origin = window.location.protocol + "//" + window.location.hostname + (window.location.port ? ':' + window.location.port: '');
 }