function swapHeader(id)
{
	var obj = document.getElementById('container_nav');
	
	if(!obj)
	{
		return;
	}
	
	switch(id)
	{
		case 'waterbouw' :
			obj.style.backgroundPosition = '61px -336px';
			
			break;
		
		case 'sloopwerk' :
			obj.style.backgroundPosition = '61px -672px';
			
			break;
		
		case 'verhuur' :
			obj.style.backgroundPosition = '61px -1008px';
			
			break;
		
		default :
			obj.style.backgroundPosition = '61px 0px';
			
			break;
	}
	/*
	id     = id == null
		? 'default'
		: id;
	
	var obj      = document.getElementById('header:' + id);
	var parent   = obj.parentNode;
	var children = parent.childNodes;
	
	for(var i = 0; i < children.length; i++)
	{
		var child = children[i];
		
		if(child.nodeName == 'DIV')
		{
			child.style.display = 'none';
		}
	}
	
	obj.style.display = 'block';
	*/
}