// initialize a variable to test for JavaScript 1.1.
// which is necessary for the window.location.replace method
var javascriptVersion1_1 = false;
javascriptVersion1_1 = true;
// initialize global variables
var detectableWithVB = false;
var pluginFound = false;

function goURL(daURL)
{
    // if the browser can do it, use replace to preserve back button
    if(javascriptVersion1_1)
		{
	    window.location.replace(daURL);
    } else {
	    window.location = daURL;
    }
    return;
}

function redirectCheck(pluginFound, redirectURL, redirectIfFound)
{
  // check for redirection
  if( redirectURL && ((pluginFound && redirectIfFound) || (!pluginFound && !redirectIfFound)) )
	{
	  // go away
	  goURL(redirectURL);
	  return pluginFound;
  } else {
	  // stay here and return result of plugin detection
	  return pluginFound;
  }	
}

function canDetectPlugins()
{
  if( detectableWithVB || (navigator.plugins && navigator.plugins.length > 0) )
	{
	  return true;
  } else {
	  return false;
  }
}

function detectFlash(redirectURL, redirectIfFound)
{
  pluginFound = detectPlugin('Shockwave','Flash'); 
  // if not found, try to detect with VisualBasic
  if(!pluginFound && detectableWithVB)
	{
	  pluginFound = detectActiveXControl('ShockwaveFlash.ShockwaveFlash.1');
  }
  // check for redirection
  return redirectCheck(pluginFound, redirectURL, redirectIfFound);
}

function detectDirector(redirectURL, redirectIfFound)
{ 
  pluginFound = detectPlugin('Shockwave','Director'); 
  // if not found, try to detect with VisualBasic
  if(!pluginFound && detectableWithVB)
	{
	  pluginFound = detectActiveXControl('SWCtl.SWCtl.1');
  }
  // check for redirection
  return redirectCheck(pluginFound, redirectURL, redirectIfFound);
}

function detectQuickTime(redirectURL, redirectIfFound)
{
  pluginFound = detectPlugin('QuickTime');
  // if not found, try to detect with VisualBasic
  if(!pluginFound && detectableWithVB)
	{
	  pluginFound = detectQuickTimeActiveXControl();
  }
  return redirectCheck(pluginFound, redirectURL, redirectIfFound);
}

function detectReal(redirectURL, redirectIfFound)
{
  pluginFound = detectPlugin('RealPlayer');
  // if not found, try to detect with VisualBasic
  if(!pluginFound && detectableWithVB)
	{
	  pluginFound = (detectActiveXControl('rmocx.RealPlayer G2 Control') || detectActiveXControl('RealPlayer.RealPlayer(tm) ActiveX Control (32-bit)') || detectActiveXControl('RealVideo.RealVideo(tm) ActiveX Control (32-bit)'));
  }	
  return redirectCheck(pluginFound, redirectURL, redirectIfFound);
}

function detectWindowsMedia(redirectURL, redirectIfFound)
{
  pluginFound = detectPlugin('Windows Media');
  // if not found, try to detect with VisualBasic
  if(!pluginFound && detectableWithVB)
	{
	  pluginFound = detectActiveXControl('MediaPlayer.MediaPlayer.1');
  }
  return redirectCheck(pluginFound, redirectURL, redirectIfFound);
}

function detectPlugin()
{
  // allow for multiple checks in a single pass
  var daPlugins = detectPlugin.arguments;
  // consider pluginFound to be false until proven true
  var pluginFound = false;
  // if plugins array is there and not fake
  if (navigator.plugins && navigator.plugins.length > 0)
	{
	  var pluginsArrayLength = navigator.plugins.length;
	  // for each plugin...
	  for (pluginsArrayCounter=0; pluginsArrayCounter < pluginsArrayLength; pluginsArrayCounter++ )
		{
	    // loop through all desired names and check each against the current plugin name
	    var numFound = 0;
	    for(namesCounter=0; namesCounter < daPlugins.length; namesCounter++)
			{
		    // if desired plugin name is found in either plugin name or description
		    if( (navigator.plugins[pluginsArrayCounter].name.indexOf(daPlugins[namesCounter]) >= 0) ||  (navigator.plugins[pluginsArrayCounter].description.indexOf(daPlugins[namesCounter]) >= 0) )
				{
		      // this name was found
		      numFound++;
		    }   
	    }
	    // now that we have checked all the required names against this one plugin,
	    // if the number we found matches the total number provided then we were successful
	    if(numFound == daPlugins.length)
			{
		    pluginFound = true;
		    // if we've found the plugin, we can stop looking through at the rest of the plugins
		    break;
	    }
	  }
  }
  return pluginFound;
} // detectPlugin

// Here we write out the VBScript block for MSIE Windows
if ((navigator.userAgent.indexOf('MSIE') != -1) && (navigator.userAgent.indexOf('Win') != -1))
{
    document.writeln('<script language="VBscript">');

    document.writeln('\'do a one-time test for a version of VBScript that can handle this code');
    document.writeln('detectableWithVB = False');
    document.writeln('If ScriptEngineMajorVersion >= 2 then');
    document.writeln('  detectableWithVB = True');
    document.writeln('End If');

    document.writeln('\'this next function will detect most plugins');
    document.writeln('Function detectActiveXControl(activeXControlName)');
    document.writeln('  on error resume next');
    document.writeln('  detectActiveXControl = False');
    document.writeln('  If detectableWithVB Then');
    document.writeln('     detectActiveXControl = IsObject(CreateObject(activeXControlName))');
    document.writeln('  End If');
    document.writeln('End Function');

    document.writeln('\'and the following function handles QuickTime');
    document.writeln('Function detectQuickTimeActiveXControl()');
    document.writeln('  on error resume next');
    document.writeln('  detectQuickTimeActiveXControl = False');
    document.writeln('  If detectableWithVB Then');
    document.writeln('    detectQuickTimeActiveXControl = False');
    document.writeln('    hasQuickTimeChecker = false');
    document.writeln('    Set hasQuickTimeChecker = CreateObject("QuickTimeCheckObject.QuickTimeCheck.1")');
    document.writeln('    If IsObject(hasQuickTimeChecker) Then');
    document.writeln('      If hasQuickTimeChecker.IsQuickTimeAvailable(0) Then ');
    document.writeln('        detectQuickTimeActiveXControl = True');
    document.writeln('      End If');
    document.writeln('    End If');
    document.writeln('  End If');
    document.writeln('End Function');

    document.writeln('</scr' + 'ipt>');
}