var arrImages = Array(2,3,4,5,6,7,8,9,10,11);
function makeRandom(intMin,intMax){
	return Math.round(Math.random()*(intMax-intMin)+intMin);
}
	 
function roterenThemasBackground(){
	var oThemaBackgroundVisual = document.getElementById("backgroundvisual");
	var intAfbeelding = makeRandom(0,(arrImages.length-1));		
		if(oThemaBackgroundVisual!=undefined){
			oThemaBackgroundVisual.src="../img/header-afbeeldingen/philips-marantz-" + arrImages[intAfbeelding] + ".jpg";
		}
}