eForm and Colorbox - any success with validation and thankyou message?

<script type="text/javascript">
var $j = jQuery.noConflict();
$j(document).ready(function(){
$j("#mybutton").click(function () {
    $j.post("[~nn~]",       
      $j("#CallBackForm").serialize(),     
      function(data){               
        $j.fn.colorbox({ html:data, open:true, iframe:true });
      },
      "html");
  });
   
$j('.callback').colorbox({href:'[~nn~]',iframe:true, height:675, width:610});
});
</script>