Accordion slideup

<script type="text/javascript">
$(document).ready(function() {
$('.accordionTitle').first().addClass('a-open');
$('.accordionContent').first().slideDown(500);

$('.accordionTitle').click(function() {
$('.accordionTitle').removeClass('a-open');
$('.accordionContent').slideUp(500);
if($(this).next().is(':hidden') == true) {
$(this).addClass('a-open');
$(this).next().slideDown(500);
}
});
$('.accordionContent').hide();
});
</script>