function setHeight(){
	var $i = 0;
	var $l = true;
	var $h = 0;
	
	while($l == true){
		var div = document.getElementsByTagName('div')[$i];
		
		if (div){
			if (div.className == 'blok-container'){
				if (div.offsetHeight){
					$h = div.offsetHeight;
				}
			}else if(div.className == 'blok blok-klein' && $h > 0){
				if (div.style.backgroundRepeat == 'no-repeat'){
					//Don't resize height
				}else{
					div.style.height = '' + $h +'px';
				}
			}
		}else{
			$l = false;
		}
		$i++;
	}
}

var active;

function submenu(id){
	
	var div = document.getElementById('menu_' + id);
	
	if (active){
		active.style.display = 'none';	
	}
	
	if (div){
		div.style.display = 'block';
		active = div;
	}
	
}