window.addEvent('load', function(){
  
  // contrain sidebar's height within header/footer
  //
  var header, footer, coords, sidebar, header_coords, window_coords, footer_coords, border;
  border = 1;
  header_height = document.id("header").getCoordinates().height
  footer_height = document.id("footer").getCoordinates().height
  sidebar = document.id("right");
  window.addEvent("resize", function () {
    window_coords = this.getCoordinates();
    sidebar.setStyles({
      top: header_height + border,
      height: window_coords.height - footer_height - header_height - (border * 2)
    });
  });
  window.fireEvent("resize");
  $(sidebar).fade('in');
});