function popUp(winURL) {
  window.open(winURL,winURL,"height=890,toolbar=no,resizable=yes,scrollbars=yes");
  return false;
}

function prepareGallery() {
  if (!document.getElementsByTagName) return false;
  if (!document.getElementById) return false;
  if (!document.getElementById("photos")) return false;
  var gallery = document.getElementById("photos");
  var links = gallery.getElementsByTagName("a");
  for ( var i=0; i < links.length; i++) {
    links[i].onclick = function() {
      return popUp(this);
	}
    links[i].onkeypress = links[i].onclick;
  }
}

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

addLoadEvent(prepareGallery);