function updateKaartMenu(geklikt)
{
	switch(geklikt)
	{
		case 'btn_projecten':	
			var sub_opvang					= document.getElementById('sub_opvang');
			var sub_personen				= document.getElementById('sub_personen');
			var sub_projecten				= document.getElementById('sub_projecten');
			
			switch(sub_projecten.style.display)
			{
				case 'none':
					sub_projecten.style.display		= 'block';
					break;
				case 'block':
					sub_projecten.style.display		= 'none';
					break;
			}
			
			/*
			var checkboxes_opvang			= sub_opvang.getElementsByTagName("input");
			
			for(var i = 0; i < checkboxes_opvang.length; i++)
			{
				checkboxes_opvang[i].checked	= false;
			}
			
			var checkboxes_personen			= sub_personen.getElementsByTagName("input");
			
			for(var i = 0; i < checkboxes_personen.length; i++)
			{
				checkboxes_personen[i].checked	= false;
			}
			
			var checkboxes_projecten		= sub_projecten.getElementsByTagName("input");
			
			for(var i = 0; i < checkboxes_projecten.length; i++)
			{
				checkboxes_projecten[i].checked	= true;
			}
			*/
			break;
		case 'btn_opvang':
			
			var sub_opvang					= document.getElementById('sub_opvang');
			var sub_personen				= document.getElementById('sub_personen');
			var sub_projecten				= document.getElementById('sub_projecten');
			
			switch(sub_opvang.style.display)
			{
				case 'none':
					sub_opvang.style.display		= 'block';
					break;
				case 'block':
					sub_opvang.style.display		= 'none';
					break;
			}
			
			/*
			var checkboxes_opvang			= sub_opvang.getElementsByTagName("input");
			
			for(var i = 0; i < checkboxes_opvang.length; i++)
			{
				checkboxes_opvang[i].checked	= true;
			}
			
			var checkboxes_personen			= sub_personen.getElementsByTagName("input");
			
			for(var i = 0; i < checkboxes_personen.length; i++)
			{
				checkboxes_personen[i].checked	= false;
			}
			
			var checkboxes_projecten		= sub_projecten.getElementsByTagName("input");
			
			for(var i = 0; i < checkboxes_projecten.length; i++)
			{
				checkboxes_projecten[i].checked	= false;
			}
			*/
			
			break;
		case 'btn_personen':
			var sub_opvang					= document.getElementById('sub_opvang');
			var sub_personen				= document.getElementById('sub_personen');
			var sub_projecten				= document.getElementById('sub_projecten');
			
			switch(sub_personen.style.display)
			{
				case 'none':
					sub_personen.style.display		= 'block';
					break;
				case 'block':
					sub_personen.style.display		= 'none';
					break;
			}
			
			/*
			var checkboxes_opvang			= sub_opvang.getElementsByTagName("input");
			
			for(var i = 0; i < checkboxes_opvang.length; i++)
			{
				checkboxes_opvang[i].checked	= true;
			}
			
			var checkboxes_personen			= sub_personen.getElementsByTagName("input");
			
			for(var i = 0; i < checkboxes_personen.length; i++)
			{
				checkboxes_personen[i].checked	= true;
			}
			
			var checkboxes_projecten		= sub_projecten.getElementsByTagName("input");
			
			for(var i = 0; i < checkboxes_projecten.length; i++)
			{
				checkboxes_projecten[i].checked	= false;
			}
			
			*/
			break;
	}
	
	var ding = document.getElementById(geklikt);
	ding.blur();
	
}

// als get-variabele 'open' is meegegeven is er vanaf een andere pagina op kaartmenu geklikt en moet er een sub geopend worden
function openMeegegeven() {
	var urlHelft = String(document.location.href).split('?');
	if(urlHelft[1])
	{
		var keyValue		= String(urlHelft[1]).split('=');
		
		if(keyValue[0] == 'open')
		{
			updateKaartMenu(keyValue[1]);
		}
	}
}

function rolErOver(welke)
{
	welke.style.backgroundImage 	= 'url(art/graphics/' + welke.id + '_ov.png)';
	
	//alert(welke.id);
}

function rolErAf(welke)
{
	welke.style.backgroundImage 	= 'url(art/graphics/' + welke.id + '.png)';
	
	//alert(welke.id);
}