function show_submenu_bg(id) {
	document.getElementById(id).className += " pijl_hover";
}

function hide_submenu_bg(id) {
	document.getElementById(id).className = document.getElementById(id).className.replace("pijl_hover", "");
}

function change()
{
	var elems = document.getElementsByTagName("div");
	for (var i=0;i<elems.length;i++)
	{
		if (elems[i].id.indexOf("menusub") >= 0)
		{
			elems[i].style.display = 'none';
		}
	}
}

function change_submenu()
{
	var elems = document.getElementsByTagName("div");
	for (var i=0;i<elems.length;i++)
	{
		if (elems[i].id.indexOf("submenu") >= 0)
		{
			elems[i].style.display = 'none';
		}
	}
}

function showsub(id) { 
	document.getElementById(id).style.display = "block";
}