var xmlHttp = false;
try {
    xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
    try {
        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    catch (e2) {
        xmlHttp = false;
    }
}
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
    xmlHttp = new XMLHttpRequest();
}
function callServer() {
    var u_name = document.getElementById("txtUserName").value;
    if ((u_name == null) || (u_name == ""))
        return;
    var url = "CheckUser.aspx?UserName=" + escape(u_name);
    xmlHttp.open("GET", url, true);
    xmlHttp.onreadystatechange = updatePage;
    xmlHttp.send(null);
}
function updatePage() {
    if (xmlHttp.readyState < 4) {
        CheckUserNameRelust.innerHTML = "<img src='/images/ajaxloading1.gif' />";
    }
    if (xmlHttp.readyState == 4) {
        var response = xmlHttp.responseText;
        CheckUserNameRelust.innerHTML = (response == "true" ? "您可以使用该登录名" : "对不起，此用户名已经被注册");
    }
    if (CheckUserNameRelust.innerHTML == "对不起，此用户名已经被注册") {
        document.form1.btnSubmit.disabled = true
    }
    else {
        document.form1.btnSubmit.disabled = false
    }
}

function ValidSumbit() {
    Page_ClientValidate();
    if (!Page_IsValid) {
        return false;
    }
    if (document.getElementById('txtValidateCodeControl1').value != document.getElementById('hidValidateCodeControl1').value) {
        alert('验证码输入的不正确！');
        document.getElementById('txtValidateCodeControl1').value = '';
        document.getElementById('txtValidateCodeControl1').focus();
        return false;
    }
    return true;
}