bName = navigator.appName
       bVer = parseInt(navigator.appVersion)

       if (bName == "Netscape" && bVer >= 3) ver = "n3"
       else if (bName == "Netscape" && bVer == 2) ver = "n2"
       else if (bName == "Microsoft Internet Explorer" && bVer >= 2) ver = "e3"

       if (ver == "n3") {
         var tools=java.awt.Toolkit.getDefaultToolkit()
         var size=tools.getScreenSize()
         var sizeheight = size.height
         var sizewidth = size.width
       } else {
         var sizeheight = 768
         var sizewidth = 1024
       }

       function showTeeth() {
          wintop=(sizeheight-300) / 2
          winleft=(sizewidth-270) / 2
          open("teeth.html", "teeth", "alwaysRaised=yes,resizable=no,width=270,height=300," +
                                      "left=" + winleft + ",top=" + wintop)
          return false
       }

       function showCModem() {
          wintop=(sizeheight-320) / 2
          winleft=(sizewidth-320) / 2
          open("cmodem.html", "cmodem", "alwaysRaised=yes,resizable=no,width=320,height=320," +
                                      "left=" + winleft + ",top=" + wintop)
          return false
       }