实现用户名检验

<script language="javascript" type="text/javascript">
<!--
       function chkName()
      {
         var ivalue = document.getElementById('txtNickName').value;
         regedit.checkName(ivalue,checkName_CallBack);
      }
     
      function checkName_CallBack(response)
      {
         if(response.error != null)
         {
            alert(response.error);
            return;
         }
        
            if(response.value ==0)
            {
               document.getElementById("result").innerHTML = "<font color=red>用户名可用</font>";
               //document.regfrm.btn.disabled= true;
              
            }
            else
            {
               document.getElementById("result").innerHTML = "<font color=red>用户名存在</font>";
               //document.regfrm.btn.disabled= false;
              
            }
       
        
      }
//-->
  </script>
&nbsp;
<script language="javascript" type="text/javascript">
<!--
       function chkName()
      {
         var ivalue = document.getElementById('txtNickName').value;
         regedit.checkName(ivalue,checkName_CallBack);
      }
     
      function checkName_CallBack(response)
      {
         if(response.error != null)
         {
            alert(response.error);
            return;
         }
        
            if(response.value ==0)
            {
               document.getElementById("result").innerHTML = "<font color=red>用户名可用</font>";
               //document.regfrm.btn.disabled= true;
              
            }
            else
            {
               document.getElementById("result").innerHTML = "<font color=red>用户名存在</font>";
               //document.regfrm.btn.disabled= false;
              
            }
       
        
      }
//-->
  </script>
&nbsp;
<script language="javascript" type="text/javascript">
<!--
       function chkName()
      {
         var ivalue = document.getElementById('txtNickName').value;
         regedit.checkName(ivalue,checkName_CallBack);
      }
     
      function checkName_CallBack(response)
      {
         if(response.error != null)
         {
            alert(response.error);
            return;
         }
        
            if(response.value ==0)
            {
               document.getElementById("result").innerHTML = "<font color=red>用户名可用</font>";
               //document.regfrm.btn.disabled= true;
              
            }
            else
            {
               document.getElementById("result").innerHTML = "<font color=red>用户名存在</font>";
               //document.regfrm.btn.disabled= false;
              
            }
       
        
      }
//-->
  </script>   

 

Ajax.Utility.RegisterTypeForAjax(typeof(regedit));
  [Ajax.AjaxMethod()]
  public  int  checkName(string name)
  {
   BusRegUser bus = new BusRegUser();
   int count = bus.BuscheckNameExsite(name);
   return count;
  }