whenever i try to fill login form (which is a magnific pop up ajax box) it gets closed in the first instance of click

<a class="simple-ajax-popup-align-top" href="result.php">try me</a><br>

jquery:

$(document).ready(function() {

$('.ajax-popup-link').magnificPopup({

type: 'ajax',

alignTop: false,

overflowY: 'scroll'

});

});

and result.php is as follows:

Email:<div class="field_container">Password:</label>

<input type='password' name='cust_password' id='password' maxlength="12" style="width: 250px; height: 30px"; /></div>

<input type='submit' name='Submit' value='Login' />

</div>

</form>

</div>