function getSize() {
	  var myWidth = 0, myHeight = 0;
	  if( typeof( window.innerWidth ) == 'number' ) {
		//Non-IE
		myWidth = window.innerWidth;
		myHeight = window.innerHeight;
	  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
		//IE 6+ in 'standards compliant mode'
		myWidth = document.documentElement.clientWidth;
		myHeight = document.documentElement.clientHeight;
	  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		//IE 4 compatible
		myWidth = document.body.clientWidth;
		myHeight = document.body.clientHeight;
	  }
	  return {width: myWidth, height: myHeight};
}

function resize(){ 
	var size = getSize();
	var htmlheight = size.height; 
	var windowheight = window.screen.height;
	var topsize = 145;
	if ( htmlheight < (windowheight) ) 
 	{
		$('leftcolumn').style.height = (size.height - topsize) + "px";
 		$('rightcolumn').style.height = (size.height - topsize) + "px";
	}
	$('content').style.height = size.height - topsize + "px";
} 

function toggleLayer(whichLayer) {	
	var layers = ['huurders', 'woningzoekenden', 'idealis', 'welkom'];
	var topmenus = ['menu-huurders', 'menu-woningzoekenden', 'menu-idealis'];
	var submenus = ['submenu1', 'submenu2', 'submenu3', 'submenu4', 'submenu5', 'submenu6', 'submenu7', 'submenu8', 'submenu9'];
	
	if (whichLayer.match(/^submenu/)) {
		submenus.each(
			function(s) {
				if (s == whichLayer) {
					Element.show(s);
				} else {
					Element.hide(s);
				}
			}
		);
		Element.hide('welkom');
	} else if (whichLayer == 'hide') {
		submenus.invoke('hide');
		layers.invoke('hide');
		Element.show('welkom');
	} else {
		layers.each(
			function(l) {
				if (l == whichLayer) {
					Element.show(l);
				} else {
					Element.hide(l);
				}
			}
		);
		Element.hide('welkom');
	}
}

function verstopLayer()
{
	$("huurders").style.display        = "none";
	$("woningzoekenden").style.display = "none";
	$("idealis").style.display         = "none";
	$("welkom").style.display          = "block";
}

var geklikt;
function broodkruimel(link) {
   if (geklikt) {
      $(geklikt).removeClassName('markeer');
   }

   $(link).addClassName('markeer');
   geklikt = link;

}