// JScript 文件
function showLicense()
{
	var display = document.getElementById( "tb" ).style.display;
	if ( display == "" )
	{
		display = "none";
		document.getElementById("LinkButton2").innerHTML = "显示会员条款";
	}
	else
	{
		display = "";
		document.getElementById("LinkButton2").innerHTML = "隐藏会员条款";
	}
	document.getElementById( "tb" ).style.display = display;
}
  var xmlHttp;
    
    function createXmlHttpRequest()
    {
        if(window.XMLHttpRequest)
        {
            xmlHttp=new XMLHttpRequest();
        
            if(xmlHttp.overrideMimeType)
                {
                    xmlHttp.overrideMimeType("text/xml");
                }
        }
        else if(window.ActiveXObject)
        {
            try
            {
                xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");   
            }
            catch(e)
            {
                xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");   
            }
        }
        if(!xmlHttp)
        {
            window.alert("你的浏览器不支持创建XMLhttpRequest对象");
        }
        return xmlHttp;

    }

//创建CheckUserName
    
function CheckUserName(name)
{
   if (document.getElementById("tbName").value=="") {
alert("用户名不能为空！");
return;
}

        createXmlHttpRequest();
    
        var url="CheckUser.aspx?Name="+encodeURIComponent(name);
    
        xmlHttp.open("post",url,true);
    
        xmlHttp.onreadystatechange=CheckUserNameResult;
    
        xmlHttp.send(null);

}

//创建用户检测的回调函数

function CheckUserNameResult()
{
    if(xmlHttp.readyState==4)//服务器响应状态
    {
        if(xmlHttp.status==200)//代码执行状态
        {
            if(xmlHttp.responseText=="true")
            {
           
                document.getElementById("lblResult").innerHTML="可以注册";
                document.getElementById("lblResult").style.color="green";
            }
            else
            {
                document.getElementById("lblResult").innerHTML="用户已经存在";
                document.getElementById("lblResult").style.color="red";
            }
        }
    }
}