function init() {

         var anchors = document.getElementsByTagName('a');
         for (i=0;i<anchors.length;i++){
                switch (anchors[i].className) {
                        case 'toggle':
                                anchors[i].onclick = toggle;
                        break;
                }
         }
}

try {
  document.execCommand("BackgroundImageCache", false, true);
} catch(err) {}

function toggle() {
         var obj = this.parentNode.parentNode.getElementsByTagName('dd')[0];
         obj.style.display = (obj.style.display == 'block') ? 'none' : 'block';
         if (obj.style.display == 'block')
                 this.innerHTML = this.innerHTML.split('Bekijk').join('Verberg');
         else
                 this.innerHTML = this.innerHTML.split('Verberg').join('Bekijk');
         return false;
}