使用jquery有问题.验证器和格式散列一起工作

我正在尝试使用jquery。验证器插件来验证我的表单，然后散列密码，但我有问题。如果我提交完整填写的表单，它工作得很好，但如果我尝试提交带有空字段的表单，散列会提交表单是否有效。我尝试了各种各样的测试，如果形式是有效的，然后触发哈希函数，但我得到未定义的函数错误。

有办法让这些一起工作吗?

格式:

<form action="process_register.php" method="post" id="user_register_form" name="user_register_form" class="login_form_box">
<table id="home_register_box">
<?php if(isset($reg_error)){echo "<h3 class='red'>$reg_error</h3>";}?>
    <tr>    
        <td><label for="username">Username</label></td><td><input type="text" id="reg_user" name="username" required=""/></td><td><div id="user_ok"><img alt="correct tick for user" src="images/tick.png"></div><div id="user_error"><img alt="incorrect cross user" src="images/cross.png"></div></td><td id="user_taken_error" style="display:none;"><span class='red error_margin med_text'>Already in use!</span></td>
    </tr>
    <tr>    
        <td><label for="name">Name</label></td><td><input type="text" id="name" name="name" required=""/></td>
    </tr>
    <tr>    
        <td><label for="email">Email</label></td><td><input type="email" id="reg_email" name="email" required=""/></td><td><div id="email_ok"><img alt="correct tick for email" src="images/tick.png"></div><div id="email_error"><img alt="incorrect cross email" src="images/cross.png"></div></td><td id="user_email_error" style="display:none;"><span class='red error_margin med_text'>Already registered!</span></td>
    </tr>                                       
    <tr>
        <td><label for="password">Password</label></td><td><input type="password" name="password" id="password" required=""/></td>
    </tr>
    <tr>
        <td></td><td><input type="submit" class="submit clickable" value="Register" onclick="formhash_register(this.form, this.form.password);" /></td>
    </tr>
</table>

        <script>
        jQuery(document).ready(function() {
            $("#user_register_form").validate({
                rules: {
                    username: "required",
                    name: "required",
                    email: {
                    required: true,
                    email: true
                    }                                                               
                }                   
            });
        });                 
    </script>   

js链接

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.9/jquery.validate.js"></script>

形式散列

function formhash_register(form, password) {
   // Create a new element input, this will be out hashed password field.
   var p = document.createElement("input");
   // Add the new element to our form.
   form.appendChild(p);
   p.name = "p";
   p.type = "hidden"
   p.value = hex_sha512(password.value);
   // Make sure the plaintext password doesn't get sent.
   password.value = "";
   // Finally submit the form.
   form.submit();

}