var menu_mediaitems = new Array(7);
var preload_mediaitems = new Array(7);

menu_mediaitems[1] = 'images/zipwall-stofvrij-werken.jpg';
menu_mediaitems[2] = 'images/zipwall-producten.jpg';
menu_mediaitems[3] = 'images/zipwall-pakketten.jpg';
menu_mediaitems[4] = 'images/zipwall-extras.jpg';
menu_mediaitems[5] = 'images/zipwall-bestellen.jpg';
menu_mediaitems[6] = 'images/zipwall-instructies.jpg';
menu_mediaitems[7] = 'images/zipwall-over-ons.jpg';

if (document.images) {
	for (var i=1; i<=7; i++) {
		preload_mediaitems[i] = new Image();
		preload_mediaitems[i].src = menu_mediaitems[i];
	}
}

function showMenu(iMenuID) {
	for (var i=1; i<=7; i++) {
		document.getElementById('menublok' + i).style.visibility = 'hidden';
	}
	document.getElementById('menublok' + iMenuID).style.visibility = 'visible';
	if (document.mediabox_image) {
		document.mediabox_image.src = menu_mediaitems[iMenuID];
	}	
	setTimeout('hideMenu();', 10000);
}

function hideMenu(iMenuID) {
	for (var i=1; i<=7; i++) {
		document.getElementById('menublok' + i).style.visibility = 'hidden';
	}
}

function showUSP(iMenuID) {
	for (var i=1; i<=13; i++) {
		document.getElementById('uspblok' + i).style.visibility = 'hidden';
	}
	document.getElementById('uspblok' + iMenuID).style.visibility = 'visible';
	
	setTimeout('hideUSP();', 20000);
}

function hideUSP(iUSP) {
	for (var i=1; i<=13; i++) {
		document.getElementById('uspblok' + i).style.visibility = 'hidden';
	}
}