function popupscroll(href,scroll,resize){
   win = window.open(href, "_blank", "width=1, height=1, location=no, menubar=no, status=no, toolbar=no, scrollbars=0, resizable=0");
  return win;
  }
  function changedir(s) {
    return s.replace('small','big');
  }

  function openbig(plaatje)
  {
  popupscroll('imageloader.html?source=' + changedir(plaatje.src.toString()),0,0)
  }