function popWin(link,target,w,h,attribs) {

  // Default attributes
  var status = 0;
  var toolbar = 0;
  var location = 0;
  var resizable = 1;
  var scrollbars = 'auto';

  if (attribs) {
    eval(attribs);
  }

  window.open(link,target,
              "width="+w+
              ",height="+h+ 
              ",status="+status+
              ",toolbar="+toolbar+
              ",location="+location+
              ",resizable="+resizable+
              ",scrollbars="+scrollbars);
}

function setImage(name, src) {
  if (document.images) {
    document.images[name].src = src;
  }
}

function preloadImage(src, w, h) {
  if (document.images) {
    var img = new Image(w, h);
    img.src = src;
  }
}