AJAX传值

   <script type="text/javascript">
       function chekuser(txtuser,name) {
           var leth = $("#txtKeyUser").val().length;
           if (leth < 8) {
             
               $("#btnAdd").attr("disabled",true);
           }
           else if (leth >= 8 && leth < 10) {
          
               $("#btnAdd").attr("disabled",false);
               $.ajax({
                   type: 'GET',
                   url: 'Ajax.ashx',
                   dataType: 'text',
                   data: 'userempyno=' + txtuser,
                   success: function (msg) {

                       //                       $("#lblUsername").html(msg);
                       if (msg == "") {
                           $("#btnAdd").attr("disabled", true);
                           $("#" + name + "").html("不存在该用户！");
                       }
                       else {
                           $("btnAdd").attr("disable",false);
                       }
                       $("#" + name + "").html(msg);
                   }
               });
           }
           else {
//               alert("输入的卡号太长！");
               $("#" + name + "").html("输入的卡号太长！");
               return;
            }
        }
   </script>