var timeout    = 500;
var closetimer = 0;
var item = 0;

function navi_open() {
	navi_canceltimer();
	navi_close();
	item = $(this).find('ul').css('visibility', 'visible');}

function navi_close() {
	if(item) {
		item.css('visibility', 'hidden');
	}
}

function navi_timer() {
	closetimer = window.setTimeout(navi_close, timeout);
}

function navi_canceltimer() {
	if(closetimer) {
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

$(document).ready(function() {
	$('#naviul > li').bind('mouseover', navi_open)
	$('#naviul > li').bind('mouseout',  navi_timer)
});

document.onclick = navi_close;

function submit_search(event, form) {
	if (event && event.which == 13) {
		form.submit();
	} else {
		return true;
	}
}