var previous_menu = "";
var menu_timer;
function menu(name) {

	if (name != "") {
		clearTimeout(menu_timer);
		
		//open het menu, en sluit het vorige
		if (name != previous_menu) {
			try {
				$('children_'+previous_menu).style.display = 'none';
			} catch (E) {}
			$('children_'+name).style.display = '';
			previous_menu = name;
		}
	}
	else {
		if (previous_menu != "") {
			id = 'children_'+previous_menu;
			menu_timer = setTimeout("$('"+id+"').style.display = 'none'; previous_menu = ''",500);
		}
	}
}



window.addEvent('domready', function(event) {
	position_logo();
})
window.addEvent('scroll', function(event) {
	position_logo();
})

function position_logo() {
	var hoogte_scherm = document.getSize().y
	var top_logo = 575
	var hoogte_logo = 93
	
	var scrolled = document.getScroll().y;
	hoogte_scherm += scrolled;
	
	if (hoogte_scherm < (top_logo+hoogte_logo)) {
		var nieuwe_top = 520;
		if (hoogte_scherm > 609) {
			nieuwe_top = hoogte_scherm - hoogte_logo
		}
		//$('logo_cso').setStyle('top',nieuwe_top)
		$('logo_cso').style.top = nieuwe_top + "px"
	}
	return
}


var prev = null
function nextPhoto() {
	
	var el = null;
	if (prev == null) {
		el = $('slideshow').getChildren('div')[0];
	}
	else {
		el = prev.getNext('div');
	}
	
	//overnieuw
	if (el == null) {
		el = $('slideshow').getChildren('div')[0];
	}

	try {
		el.setStyle('opacity','0')
		el.setStyle('display','block')
		
		//fade vorige uit
		if (prev != null) {
			prev.set('morph', {duration: 'long'});
			prev.morph({opacity: 0});
		}
		
		//fade huidige in
		el.set('morph', {duration: 'long'});
		el.morph({opacity: 1});
		
		prev = el;
	} catch (e) {}
}

function slideshow() {
	var timer = nextPhoto.periodical(3000);
}

function play_movie(object) {
	object = $(object)
	object.setStyle('display','none')
	
	var FO = { 
	movie:"flvplayer.swf",
	width:"352",
	height:"288",
	majorversion:"7",
	build:"0",
	bgcolor:"#FFFFFF",
	flashvars:"file=boog.flv&showdigits=false&showicons=false&autostart=true&showfsbutton=false&repeat=false&fsreturnpage=welkom.html" };
	
	UFO.create(FO, "video_swf");
}