sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (document.all&&document.getElementById) window.onload=sfHover;

function SwitchNav(ButtonName)
{

	var ButtonSrc = "";
	for(i=0;i<document.images.length;i++)
	{
		ButtonSrc = document.images[i].src;

		if(ButtonSrc.indexOf(ButtonName)>0)
		{
			document.images[i].src = ButtonSrc.replace("uit","aan");
		}
		else
		{
			document.images[i].src = ButtonSrc.replace("aan","uit");
		}
		
	}
	
}