var current = null
    doAll = (document.all!=null)

      function getCSSPElement(id) {
        if (doAll) 
          return document.all[id]
        else
          return document.layers[id]
      }

      function showElement(id) {
        var pEl = getCSSPElement(id)
        if (current!=null)
          if (doAll)
            current.style.visibility = ""
          else
            current.visibility = "hide"     
        if (pEl != null)
          if (doAll)
            pEl.style.visibility = "visible"
          else
            pEl.visibility = "show"
        current = pEl
        // Code added to presentation for the ad banner
        if (parent.updateAd!=null)
          parent.updateAd()
      }