if (document.images) {
	img1on = new Image();
	img1on.src = 'images/categories/over_verpleegkundige.jpg';
	img1off = new Image();
	img1off.src = 'images/categories/verpleegkundige.jpg';

	img2on = new Image();
	img2on.src = 'images/categories/over_arts.jpg';
	img2off = new Image();
	img2off.src = 'images/categories/arts.jpg';

	img3on = new Image();
	img3on.src = 'images/categories/over_paramedicus.jpg';
	img3off = new Image();
	img3off.src = 'images/categories/paramedicus.jpg';

	img4on = new Image();
	img4on.src = 'images/categories/over_wetenschapper.jpg';
	img4off = new Image();
	img4off.src = 'images/categories/wetenschapper.jpg';

	img5on = new Image();
	img5on.src = 'images/categories/over_administratief.jpg';
	img5off = new Image();
	img5off.src = 'images/categories/administratief.jpg';

	img6on = new Image();
	img6on.src = 'images/categories/over_technicus.jpg';
	img6off = new Image();
	img6off.src = 'images/categories/technicus.jpg';

	img7on = new Image();
	img7on.src = 'images/categories/over_stagiair.jpg';
	img7off = new Image();
	img7off.src = 'images/categories/stagiair.jpg';

	img8on = new Image();
	img8on.src = 'images/categories/over_andere.jpg';
	img8off = new Image();
	img8off.src = 'images/categories/andere.jpg';

}

function handleClick(rowID)  {
	if(document.getElementById(rowID)){
    if(document.getElementById(rowID).style.display=='none') {
        document.getElementById(rowID).style.display = "";
    }
      else {
          document.getElementById(rowID).style.display = "none";
      }
	 }
}

function imgOn(imgName) {
  if (document.images) {
    document[imgName].src = eval(imgName + "on.src");
  }
}
         
function imgOff(imgName) {
  if (document.images) {
    document[imgName].src = eval(imgName + "off.src");
  }
}