var timeout    = 1000;
var closetimer = 0;
var dropmenuitem = 0;

function dropMenu_open() {
	dropMenu_cancelTimer();
	dropMenu_close();
	dropmenuitem = $(this).find('ul').css('visibility', 'visible');
}
			
function dropMenu_close() {
	if(dropmenuitem) dropmenuitem.css('visibility', 'hidden');
}
				
function dropMenu_timer() {
	closetimer = window.setTimeout(dropMenu_close, timeout);
}
				
function dropMenu_cancelTimer() {
	if(closetimer) {
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}