function getBrowserHeight () {
	
		if (window.innerHeight) return window.innerHeight;
		else if (document.documentElement && document.documentElement.clientHeight != 0) return document.documentElement.clientHeight;
		else if (document.body) return document.body.clientHeight;
		return 0;
		
	}
	
	function resizeStuff () {
	
		var height = getBrowserHeight();
		height = height - 185;
		if (document.getElementById('left_nav')) document.getElementById('left_nav').style.height = height + "px";
		if (document.getElementById('middle_nav')) document.getElementById('middle_nav').style.height = height + "px";
		if (document.getElementById('right_nav')) document.getElementById('right_nav').style.height = height + "px";
		if (document.getElementById('middle_back')) document.getElementById('middle_back').style.height = height + "px";
		
	}
	
	function giefClick (active, page) {
		
		document.getElementById('nav_home').style.backgroundImage = 'none';
		document.getElementById('nav_home').style.color = '#333333';
		document.getElementById('nav_gebouwen').style.backgroundImage = 'none';
		document.getElementById('nav_gebouwen').style.color = '#333333';
		document.getElementById('nav_interieur').style.backgroundImage = 'none';
		document.getElementById('nav_interieur').style.color = '#333333';
		document.getElementById('nav_publicaties').style.backgroundImage = 'none';
		document.getElementById('nav_publicaties').style.color = '#333333';
		document.getElementById('nav_buro').style.backgroundImage = 'none';
		document.getElementById('nav_buro').style.color = '#333333';
		document.getElementById('nav_contact').style.backgroundImage = 'none';
		document.getElementById('nav_contact').style.color = '#333333';
		document.getElementById('nav_login').style.backgroundImage = 'none';
		document.getElementById('nav_login').style.color = '#333333';
		document.getElementById('nav_disclaimer').style.backgroundImage = 'none';
		document.getElementById('nav_disclaimer').style.color = '#333333';
		document.getElementById('nav_' + active).style.backgroundImage = 'url(images/bg_left_nav_hover.gif)';
		document.getElementById('nav_' + active).style.color = '#fefb38';
		document.getElementById('nav_' + page).style.backgroundImage = 'url(images/bg_left_nav_click.gif)';
		document.getElementById('nav_' + page).style.color = '#333333';
		
	}
	
	function fixH(one,two) {

		if (document.getElementById(one)) {

			var lh=document.getElementById(one).offsetHeight;
			var rh=document.getElementById(two).offsetHeight;
			var nh = Math.max(lh, rh);
			document.getElementById(one).style.height=nh+"px";
			document.getElementById(two).style.height=nh+"px";
		}
		
	}
	
	function giefTooltip(id) {
		document.getElementById(id).style.display = "block";
	}
	function gwayTooltip(id) {
		document.getElementById(id).style.display = "none";
	}
		

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}