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window.onload=function(){
    var btnAdd=$("btnSubmit");
    btnAdd.onclick=function(){
        check();
    }
   
}
var name;
var pass;
function check(){
    name=$("tbUserName").value;
    pass=$("tbPassword").value;
    if(name==""){
       alert("please check the name");
       return;
    }
    if(pass==""){
       alert("please check the pass");
       return;
    }
   
    var xmlStr="<login>";
    xmlStr+="<name>"+escape(name)+"</name>";
    xmlStr+="<pass>"+escape(pass)+"</pass>";
    xmlStr+="</login>";
   
   
    var url="Login.ashx";
    var myAjax=new Ajax.Request(
                                   url,
                                   {
                                      method:"post",
                                      postBody:xmlStr,
                                      onComplete:Login
                                     
                                   }
                                );
}
function Login(xmlhttp){
   var result=xmlhttp.responseText;
   if(result!="true"){
      alert("name or pass is not true!please reset the mes");
      return;
   }
 setCookie("customerinfo", result, 1);
    readcustomercookielog();
}

[color=#FF0000]一般处理文件[/color]

public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/plain";
        if (context.Request.InputStream != null)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(context.Request.InputStream);
            String result = "";
            if (doc != null)
            {
                String username = context.Server.UrlDecode(doc.GetElementsByTagName("name")[0].InnerXml);
                String userpass = context.Server.UrlDecode(doc.GetElementsByTagName("pass")[0].InnerXml);

                if (username == "zhangsan" && userpass == "123")
                {
                    result = "true";
                }
                else
                {
                    result = "false";
                }
            }
            else
            {
                result = "faile";
            }
            context.Response.Write(result);
            context.Response.Flush();
        }
    }