var theImages = new Array()
var theLinks = new Array()

theImages[0] = '<a href="projecten_rova.html"><img src="images/project_rova_g.jpg" border="0" ></a>'
theImages[1] = '<a href="projecten_knsb.html"><img src="images/project_knsb_g.jpg" border="0" ></a>'
theImages[2] = '<a href="projecten_poiesz.html"><img src="images/project_poiesz_g.jpg" border="0" ></a>' 
theImages[3] = '<a href="projecten_drq.html"><img src="images/project_drq_g.jpg" border="0" ></a>' 

var j = 0
var p = theImages.length;
var preBuffer = new Array()
for (i = 0; i < p; i++){
   preBuffer[i] = new Image()
   preBuffer[i].src = theImages[i]
}
var whichImage = Math.round(Math.random()*(p-1));
function showImage(){
document.write(''+theImages[whichImage]+'');
}