window.addEvent('domready', function(){
	$$('.submenu').set('opacity', 0);
	$$('.td_main_navigation').each(function(el){
		el.addEvent('mouseenter', function(e){
			close_all();
			var subLink = $(el.id+"_sub");
			if(subLink)
			{
				subLink.set('tween', {duration: '600'});
				subLink.tween('opacity', '1');
			}
			el.addClass('menu_selected');
			$('service').addEvent('mouseleave', function(e){
				setTimeout("close_all()", 2000);
			})
			subLink.addEvent('mouseleave', function(e){
				tag = true;
				close_all();
			})	
			subLink.addEvent('mouseenter', function(e){
				tag = false;
				close_all();
			})	
		});
	});
	$$('.submenu').setStyle('display','');
});
var tag = false;
function close_all()
{
	if(tag == true)
	{
		$$('.td_main_navigation').each(function(el){
			var subLink = $(el.id+"_sub");
			if(subLink)
			{
				subLink.set('tween', {duration: '300'});
				subLink.tween('opacity', '0');
			}
			el.removeClass('menu_selected');		
		});
	}
}