if (document.images) {

  // new button
  firmOn = new Image();
  firmOn.src = "/images/nav/firm-ro.png"

  firmOff = new Image();
  firmOff.src = "/images/nav/firm.png"

  // new button
  practice_areasOn = new Image();
  practice_areasOn.src = "/images/nav/practice_areas-ro.png"

  practice_areasOff = new Image();
  practice_areasOff.src = "/images/nav/practice_areas.png"

  // new button
  attorneysOn = new Image();
  attorneysOn.src = "/images/nav/attorneys-ro.png"

  attorneysOff = new Image();
  attorneysOff.src = "/images/nav/attorneys.png"

  // new button
  newsOn = new Image();
  newsOn.src = "/images/nav/news-ro.png"

  newsOff = new Image();
  newsOff.src = "/images/nav/news.png"

  // new button
  linksOn = new Image();
  linksOn.src = "/images/nav/links-ro.png"

  linksOff = new Image();
  linksOff.src = "/images/nav/links.png"

  // new button
  contactOn = new Image();
  contactOn.src = "/images/nav/contact-ro.png"

  contactOff = new Image();
  contactOff.src = "/images/nav/contact.png"

}

function changeImages() {
  // link syntax:
  // <a href="/xxx.php" onMouseOver="changeImages('xxx', 'xxxOn')" onMouseOut="changeImages('xxx', 'xxxOff')"><img src="/images/nav/xxx.png" alt="xxx" name="xxx" id="xxx" width="164" height="36" /></a>
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document.images[changeImages.arguments[i]].src = window[changeImages.arguments[i+1]].src;
    }
  }
}

function openNewWindow(theURL,winName,features) {
  window.open(theURL,winName,features);
}