/* ******************************************************
** SOUND.JS - JS Sound-Processing Library
** ======================================
** This library contains JS code to process sound. 
** Enjoy ... and please maintain this header!
**
** To load this library in an HTML doc, put the following
** line in the doc's HEAD (before any other SCRIPT tags):
**
** <SCRIPT SRC="sound.js" LANGUAGE="JavaScript"></SCRIPT>
**
** Author      Ver  Date    Comments
** ======      ===  ====    ========
** Rick Scott  1.0  2/1/00  First release
**
** Copyright 2000, Rick Scott, all rights reserved.
****************************************************** */

var currSoundFile;  // must keep track of current sound file

// setting the SRC attribute of this BGSOUND element
// (as in sound.src = soundFile) will cause the
// specified soundFile to play in Internet Explorer
// note: depending on your sound files, you might want 
// to change the VOLUME setting
document.write("<BGSOUND ID='sound' VOLUME='100%'>");

function playSound(soundFile)  // play the sound file
  {
  // this if statement guarantees that:
  // incidental (click/rollover) sounds will overlap main sounds (Canon in D, etc.)
  //   (provided that the browser plug-in can handle sound overlaps)
  // main sounds won't overlap each other
  // only main (not click/rollover) sounds will play when user clicks Go!
  if ((soundFile != "clicklow.wav") && (soundFile != "clickhi.wav") &&
      (soundFile != "rollover.wav"))
    {
    stopSound();
    currSoundFile = soundFile;
    }

  if (document.layers)    // Netscape
    {
    var arr = soundFile.split(".");
    eval("document." + arr[0] + ".play()");
    }
  else if (document.all)  // Internet Explorer
    {
    sound.src = soundFile;  // as explained above
    }
  }

function stopSound()  // stop all currently playing sounds
  {
  if (document.layers)    // Netscape
    document.canon.StopAll();
  else if (document.all)  // IE
    sound.src = "";
  }