text: function validateSignin()
  {
   var username=document.signin.username;
   var password=document.signin.password;
  
      if(username_validate(username))
      {  
            if(password_validate(password))
          {
          }
      }
    
  }
  
  function username_validate(username)
  {
      if(username.value==null || username.value=="")
      {
       //window.alert("Please Enter The Username");
      //username.focus();
      $('#username_error').css({ "display": "inline" }); 
       return false;
  }
    
      
      
      else
      {
      $('#username_error').css({ "display": "none" }); 
       return true;   
      }
  }
  
  function password_validate(password)
  {
   if(password.value==null || password.value=="")
   {
    //window.alert("Please Enter The Passwords");
    //password.focus();
       $('#password_error').css({ "display": "inline" }); 
      return false;
   }
    else
    {
       $('#password_error').css({ "display": "none" });
     return true;   
    }
  }