Form with jQuery Number Verification

gistfile1.html

<div id="MyForm">
<form method="POST" name="info-form">
    <input type="hidden" value="/form-sent" name="returnURL" />
    <label for="First Name">First Name: </label>
    <input type="text" name="First Name" maxlength="40" />
    <label for="Last Name">Last Name: </label>
    <input type="text" name="Last Name" maxlength="80" />
    <label>Enter the below number: </label>
    <input type="hidden" value="701469" id="verifyNumHidden" name="verifyNumHidden" />
    <input type="text" id="enterVerify" name="enterVerify" />
    <div id="verifyNum"></div>
    <input type="submit" value="Submit" name="save" class="cat_button" />
</form>
</div>