var xmlHttp4
function LoginUser(LoginName, LoginPwd) {

    xmlHttp4 = GetXmlHttpObject4();
    if (xmlHttp4 == null) {
        alert("您的浏览器不支持AJAX！");
        return;
    }


    var url = "/Ajax/ValidationUserLoginWhenReturn.aspx";
    url = url + "?LoginName=" + LoginName;
    url = url + "&LoginPwd=" + LoginPwd;
    url = url + "&sid=" + Math.random();
    xmlHttp4.onreadystatechange = stateChanged4;
    xmlHttp4.open("GET", url, true);
    xmlHttp4.send(null);
}

function stateChanged4() {

    if (xmlHttp4.readyState == 4) {
    
        if (xmlHttp4.status == 200) {

            if (xmlHttp4.responseText == "TrueAndDP") {  
                var aa=""              
               alert("提交点评成功！");
                 var bb=""
            } else {
               //alert("登录失败");
            }             
        }
        else {
           // alert("HTTP 错误，状态码：" + xmlHttp4.status);
        }

    }
}

function GetXmlHttpObject4() {
    var xmlHttp4 = null;
    try {
        // Firefox, Opera 8.0+, Safari
        xmlHttp4 = new XMLHttpRequest();
    }
    catch (e) {
        // Internet Explorer
        try {
            xmlHttp4 = new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e) {
            xmlHttp4 = new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
    return xmlHttp4;
}