var arrImagesVisual = Array(1,2,3,4,5,6,7);
	 function makeRandom(intMin,intMax){
	  return Math.round(Math.random()*(intMax-intMin)+intMin);
	 }		
		function roterenThemas(){
			var oThemaVisual = document.getElementById("visual");
			var intAfbeelding = makeRandom(0,(arrImagesVisual.length-1));		

			
			if(oThemaVisual!=undefined){
				oThemaVisual.src="/img/visuals/visual-" + arrImagesVisual[intAfbeelding] + ".jpg";
			}
			
		}