function extrastoggle(visibility) {
	var themenu = document.getElementById('submenuextras');

	if(!visibility){
		if(themenu.style.display == 'none')
			themenu.style.display = 'block';
		else
			themenu.style.display = 'none';
	}else{
		themenu.style.display = visibility;
	}
}

function thematoggle(submenu, visibility) 
{
	var themenu = document.getElementById(submenu);

	if (themenu == null) {
		return;
	}

	if(!visibility){
		if(themenu.style.display == 'none' || themenu.style.display == '')
			themenu.style.display = 'block';
		else
			themenu.style.display = 'none';
	}else{
		themenu.style.display = visibility;
	}
}

function mouseover(id) {
	var image = document.getElementById(id);
	var url = image.src;
	var newurl = url.replace('.gif', '_.gif');
	image.src = newurl;
}

function mouseout(id) {
	var image = document.getElementById(id);
	var url = image.src;
	var newurl = url.replace('_.gif', '.gif');
	image.src = newurl;
}