var names = new Array;
names[0]='over';
names[1]='cases';
names[2]='actueel';
names[3]='klanten';
names[4]='contact';
names[5]='organisatie';
names[6]='coaching';
names[7]='interim';
names[8]='search';

function setActiveTab(){
  for (i=0; i < names.length; i++){
    var link = document.getElementById(names[i]);
    var img = document.getElementById(names[i] + 'Img');
    if(link.href == window.location.href) {
      img.src = 'fileadmin/' + names[i] + '_active.jpg';
    } else {
      img.src = 'fileadmin/' + names[i] + '.jpg';
    }
  }
}

if(window.addEventListener) {
  window.addEventListener('load', setActiveTab, false);
} else {
  window.attachEvent('onload',setActiveTab);
}