php - Cancel submit jquery -

this part of code form requesting data check if email alredy exist. thing is, program supposed return 0 if there no mail this. dont work properly, because program keep sending data, if mail not correct.

if want more info, or missing let me know. in advance.

$(document).ready(function () {     $("#enviar").click(function(e)  {         e.preventdefault();         var error = false;         consulta = $("#email2").val();         $.ajax({             type: "post",             url: "compruebaemail.php",             data: "b="+consulta,             datatype: "html",             error: function(){                 alert("error petición ajax");             },             success: function(data){                   if(data==0){                     $("#error").html("email  incorrecto");                     error = false;                 }else{                     $("form").unbind('submit').submit();                 }             }         });          if (error){                return false;            }     }); }); 

and here compruebaemail.php

<?php require_once('connections/vinoteca.php'); ?>   <?php      mysql_select_db($database_vinoteca, $vinoteca);        $user = $_post['b'];        if(!empty($user)) {             comprobar($user);       }        function comprobar($b) {               $sql = mysql_query("select * usuarios email = '".$b."'");              $contar = mysql_num_rows($sql);              if($contar == 0){                   echo 0;             }else{                   echo 1;             }       }      ?> 

and here goes post

<form method="post" name="form1" action="validarusu.php">     <div class="row">              <span class="center">email</span>         </div>     <div class="row">             <input type="text" name="email" id="email2" value="" size="32" />               </div>       <div class="row">         <span class="center">contrase&ntilde;a</span>            </div>     <div class="row">         <input type="password" name="password"   id="id2" value="" size="32" />             </div>       <div class="row">                <span id="error"> </span>      </div>      <div class="row">         <input type="submit" value="acceder" id="enviar" size="20">     </div>      <div class="row">         <a href="recuperarpassword.php">recuperar contrase&ntilde;a</a>     </div>  </form> 

the problem you're returning false ajax function. need return false click function. give try:

$("#enviar").click(function() {     var error = false;     consulta = $("#email2").val();     $.ajax({         type: "post",         url: "compruebaemail.php",         data: "b="+consulta,         datatype: "html",         error: function(){             alert("error petición ajax");         },         success: function(data){               if(data==0){                 $("#error").html("email  incorrecto");                 error = true;             }         }     });      if (error)         return false;    });