var popUpWin=0;
function popUpWindow(URLStr, left, top, width, height){
  if(popUpWin){
	if(!popUpWin.closed) popUpWin.close();
  }
  popUpWin = open(URLStr, 'popUpWin','toolbar=yes,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
}

// bepaalt hoogte contentcontainer

function setContentHeight() {
	if (document.getElementById) {
		var windowHeight=getWindowHeight();
		if (windowHeight>0) {
			document.getElementById('contentcontainer').style.height=(windowHeight-116)+'px';  // offset from top 
		}
	}
}

function setContentHeightHome() {
	if (document.getElementById) {
		var windowHeight=getWindowHeight();
		if (windowHeight>0) {
			document.getElementById('contentcontainer_home').style.height=(windowHeight-196)+'px';  // offset from top 
		}
	}
}

function getWindowHeight() {
	var windowHeight=0;
	if (typeof(window.innerHeight)=='number') {
		windowHeight=window.innerHeight;
	} else {
		if (document.documentElement&&
			document.documentElement.clientHeight) {
			windowHeight=
			document.documentElement.clientHeight;
		} else {
			if (document.body&&document.body.clientHeight) {
				windowHeight=document.body.clientHeight;
			}
		}
	}
	return windowHeight;
}

// random image

function RandomImageHome() {
	var imagenumber = 4 ;
	var randomnumber = Math.random() ;
	var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ;
	images = new Array;
	images[1] = "/images/topbeelden_home01.jpg";
	images[2] = "/images/topbeelden_home01.jpg";
	images[3] = "/images/topbeelden_home01.jpg";
	images[4] = "/images/topbeelden_home01.jpg";
	var image = images[rand1];
	document.write('<img src="' + image + '" width="840" height="160">');
}

function RandomImage() {
	var imagenumber = 5 ;
	var randomnumber = Math.random() ;
	var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ;
	images = new Array;
	images[1] = "/images/topbeelden01.jpg";
	images[2] = "/images/topbeelden02.jpg";
	images[3] = "/images/topbeelden03.jpg";
	images[4] = "/images/topbeelden04.jpg";
	images[5] = "/images/topbeelden05.jpg";
	var image = images[rand1];
	document.write('<img src="' + image + '" width="840" height="80">');
}