function checklogin()
{
  if(document.Form1.admin_name.value=='')
     {alert('û');
      document.Form1.admin_name.focus();
      return false
    }
  if (document.Form1.admin_pass.value=='')
   {alert('');
    document.Form1.admin_pass.focus();
    return false
   }
  if (document.Form1.code.value=='')
  {alert('֤');
   document.Form1.code.focus();
   return false
 }
}

function refreshimg()
{
document.all.checkcode.src="../inc/mywebcode.asp";
}