function navliclick(id)
{
	menucat=document.getElementById(id);
	menusub=document.getElementById(id + 'submenu');
	if(menucat.className == 'navmenuclose')
	{
		menucat.className = 'navmenuopen';
		menusub.className = 'visible';
	}
	else
	{
		menucat.className = 'navmenuclose';
		menusub.className = 'hidden';
	}
}

function navcollapse()
{
	i = 1;
	menucat=document.getElementById("nav" + i);
	while(menucat != null)
	{
		menusub=document.getElementById("nav" + i + 'submenu');
		if(menucat.className == 'navmenuopen')
		{
			menucat.className = 'navmenuclose';
			menusub.className = 'hidden';
		}
		i++;
		menucat=document.getElementById("nav" + i);
	}
}