var menu_marginLeft = '-150px';

var menuactive = false;
var menutimer;
var menutimer_internval = 1500;

$(document).ready (function() {						
							
	menutimer = getMenuInterval();
	
	$('#nav_wrapper,#nav_wrapper a').hover(
		function () {
			menuactive = true;
			menushow();
		},
		function () {
			menuactive = false;
		}			
	);
	
});

function getMenuInterval(){
	return setInterval('checkmenu()',menutimer_internval);	
}

function checkmenu(){
	(menuactive)?menushow():menuhide();
}

function menushow(){
	clearInterval(menutimer);
	menutimer = getMenuInterval();
	$('#nav_wrapper a').stop().animate({'opacity': '100','marginLeft':'0'},200);
}

function menuhide(){
	clearInterval(menutimer);
	menutimer = getMenuInterval();
	$('#nav_wrapper a').stop().animate({'opacity': '0','marginLeft':menu_marginLeft},200);
}