// onload event coupler
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') { 
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

addLoadEvent(function() {
  initRollover();
});


/* laat projectenlijst zien op de Opdrachtgevers-pagina */
function showList(Obj){
	var objParent = Obj.parentNode;
	var ulArr = objParent.getElementsByTagName('ul');
	
	if(ulArr.length > 0){
		for(i=0; i < ulArr.length; i++){
			ulArr[i].style.display = (ulArr[i].style.display == 'block') ? 'none' : 'block';
		}
	}else {
		return false;
	}
	
}