function preloader() {
	// counter
	var i = 0;
	// create object
	imageObj = new Image();
	// set image list
	images = new Array();
	images[0]="img/navigatie_projects_over.gif";
	images[1]="img/navigatie_news_over.gif";
	images[2]="img/navigatie_info_over.gif";
	// start preloading
	for(i=0; i<=3; i++) {
		imageObj.src=images[i];
	}
}