Jquery+validate

<script type="text/javascript" src="includes/jquery.validate.pack.js"></script>
<script type="text/javascript" src="includes/messages_cs.js"></script>
<script type="text/javascript">
//<![CDATA[ 
   $(document).ready(function(){  
     $("input[name=email]").focus(function(){ if(this.value == 'Váš email'){this.select();}});
     $("#reg_form").validate({ rules: {email: {required: true,email: true},answere: {required: true}}});  
        $("form#reg_form").submit(function(){   
           $.post("jsonform.php",{   
                 email: $("input[name=email]").val(),   
                 answere: $("input[name=answere]").val(),
                 captchaid: $("input[name=captchaid]").val(), 
                 pass_two: $("input[name=pass_two]").val(),  
                 register: "true",  
  
                }, function(data) {
               if(data.def == 1){ $("#register_hid").html(data.msg); $("#register_err").html('');}else{
                  $("#register_err").html(data.msg);
                  $("#register_err").fadeIn(1500);}
           }, 'json');           
          return false;   
         });
   });  
//]]> 
</script>