函数调用出错，不知为什么 _JavaScript

函数调用出错，不知为什么，请指教
正在学习ASP + javascript + SQL

<input onBlur="login_onblur()" name="yhid" type="text" id="textfield2" size="30" />

<%
function login_onblur()
{
var sql
sql = "select A.User_code,A.User_name,A.User_PSD,CONVERT(varchar(100), P.Begin_date, 23) as Begin_date, CONVERT(varchar(100), P.END_date, 23) as END_date,Q.vendorCode,Q.cvenname FROM vendor_username A LEFT JOIN vendor_JiaoFei P ON A.vendorid=P.vendorid LEFT JOIN ba_vendor_all Q ON A.vendorid=Q.vendorid where A.if_active=1 and getDATE()>=P.Begin_date and getDATE()<=P.END_date and A.User_Code="

Response.Write(sql)
Response.End

}
%>

运行结果是：无任何反应，也无任何出错提示。

------解决方案--------------------
这要用ajax来实现



function getPage(url){

	 var xhr=window.ActiveXObject?  new ActiveXObject("Microsoft.XMLHTTP"):new XMLHttpRequest();

	 xhr.open('get',url,false);

	 xhr.send(null);

	 return xhr.responseText

 }

function login_onblur()

{

   var content= getPage(login_onblur.asp)

   alert(content)

}

独立个asp页面 login_onblur.asp





var sql

sql = "select A.User_code,A.User_name,A.User_PSD,CONVERT(varchar(100), P.Begin_date, 23) as Begin_date, CONVERT(varchar(100), P.END_date, 23) as END_date,Q.vendorCode,Q.cvenname FROM vendor_username A LEFT JOIN vendor_JiaoFei P ON A.vendorid=P.vendorid LEFT JOIN ba_vendor_all Q ON A.vendorid=Q.vendorid where A.if_active=1  and getDATE()>=P.Begin_date and getDATE()<=P.END_date and A.User_Code=" 



Response.Write(sql)