form validation for NOT matches

[eluser]blorriman[/eluser]
sorry . . .

Code:

<div id="signup_form" class="span-10">
    <fieldset>
        <legend>Create New Account</legend>
    &lt;form action="http://localhost/login/create_member" method="post"&gt;&lt;input type="text" name="first_name" value="set first name" id="first_name" placeholder="First Name"  /><br>&lt;input type="text" name="last_name" value="last name"  /&gt;&lt;br>&lt;input type="text" name="email_address" value="email address"  /&gt;&lt;br>    </fieldset>
</div>
<div id="signup_form" class="span-10 push-2">
    <fieldset>
        <legend>Login Information</legend>

        &lt;input type="text" name="username" value="username"  /&gt;&lt;br>&lt;input type="text" name="password" value="password"  /&gt;&lt;br>&lt;input type="text" name="password2" value="confirm password"  /&gt;&lt;br>&lt;input type="submit" name="submit" value="create account"  /&gt;&lt;br>
            </fieldset>
</div>