Search in secondary menu glitch

Hi there

I’m developing a site and have moved the search from the main to the secondary menu using:

add_action('wp_footer', 'ava_custom_script');
function ava_custom_script(){
?>
<script type="text/javascript">
(function($) {
	$(window).load(function() {
		$("#menu-item-search").detach().appendTo('#header_meta #avia2-menu');
	});
})(jQuery);
</script>
<?php
}

However when the page loads, and reloads the search flickers between the two locations. Firefox seems OK but Chrome and Safari both have the issue.

I’ve used the Widget in the Header option but the search button was different and the client prefers this format.

Any ideas
Thanks
Richard