//    Copyright (c) Franz J Mayrhofer, Gavilan College.  All rights reserved.

//-----------------------------------------------------------------
//    WMP code adapted from WMP SDK Samples:  PlayerDetection.js            
//-----------------------------------------------------------------

//------------------------
//-- Global Vars 
//------------------------

var WMPVer = "unknown";       // Set to WMP version string detected
var fHasWMP = false;          // True if either WMP v6.4 or v7+ found
var fHasWMP64 = false;        // True if WMP v6.4 found
var fHasWMP7 = false;         // True if WMP v7+ (8, 9) found
var fAppletRunning = false;   // True if v9 Applet is in use
var fPluginRunning = false;   // True if v6.4 Netscape plugin is in use
var player = null;            // Identifies window opened by play function

//-----------------------------------------------
// Name:  GetBrowser
// Purpose: Get Browser Information
//-----------------------------------------------
function GetBrowser()
{
   var agt=navigator.userAgent.toLowerCase();
   if( ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1)) )
       return "IE";
   else if( ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
         && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
         && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1)) )
       return "Netscape";
   else
       return "unknown";
}


//------------------------------------------------
// Name:  GetBaseURL
// Purpose: Get URL of web directory containing current page
//------------------------------------------------
function GetBaseURL()
{
      var s = window.location.href;
	var i = s.lastIndexOf("/");
	if ((s.substring(0,4)=="http") && (i>0)) {
		return s.substring(0,i+1);
		}
	else
		return "";
}


//------------------------------------------------
// Name:  GetIEMajorVer
// Purpose: Get Internet Explorer Major Version Number
//------------------------------------------------
function GetIEMajorVer()
{
      var agt=navigator.userAgent.toLowerCase();
	var s = agt.split(";");
	if (s[1]) {
		var c = s[1];
		c = c.substring(6);
		c = c.split(".");
		return c[0];
		}
	else
		return("unknown");
}


//-------------------------------------------------
// Name:  GetIEMinorVer
// Purpose: Get Internet Explorer Minor Version Number.
//-------------------------------------------------
function GetIEMinorVer()
{
      var agt=navigator.userAgent.toLowerCase();
	var s = agt.split(";");
	if (s[1]) {
		var c = s[1];
		c = c.substring(6);
		c = c.split(".");
		if (c[1])
			return c[1];
		else
			return("unknown");
		}
	else
		return("unknown");
}

//------------------------------------------------
// Name:  GetPlayerMajorVer
// Purpose: Get Media Player Major Version Number
//------------------------------------------------
function GetPlayerMajorVer()
{
	var strVer = new String(WMPVer);
	var s = strVer.split(".");
    return s[0];
}


//-------------------------------------------------
// Name:  GetPlayerMinorVer
// Purpose: Get Media Player Major Version Number.
//-------------------------------------------------
function GetPlayerMinorVer()
{
	var strVer = new String(WMPVer);
	s = strVer.split(".");
	if (s[1])
		return s[1];
	else
		return("unknown");
}


//-----------------------------------------------------------------
// Name: IsNSPluginInstalled
// Purpose: Checks mime types to determine if the WMP 6.4 Netscape 
//          Plugin is installed.
//-----------------------------------------------------------------
function IsNSPluginInstalled()
{
    // See if 6.4 pluggin installed
    if (navigator.mimeTypes && navigator.mimeTypes["application/x-mplayer2"] && navigator.mimeTypes["application/x-mplayer2"].enabledPlugin)
		return(true);
	else
		return(false);
}


//-----------------------------------------------------------------
// Name: play(audioFile [startPosition])
// Purpose: Creates a customized version of the WMPlayer in a new window.
//          The content depends on WMPVer and BrowserVer detected.
//-----------------------------------------------------------------

function play(audioName) {
player=window.open("","player",'toolbar=no,location=no,status=no,resizable=yes,width=310,height=85');
doc=player.document.open("text/html");
doc.writeln('<html><head><title>reproduciendo...</title></head>');

var br = GetBrowser();        // Returns either "IE" or "Netscape"
var pm = GetPlayerMajorVer(); // Returns Windows Media Player major version #
var pn = GetPlayerMinorVer(); // Returns Windows Media Player minor version #

// Case 1: Media Player version is unknown, using Netscape and
//         plugin installed and supported by Netscape version
if (pm=="unknown" && br=="Netscape" && IsNSPluginInstalled())  
   {
doc.writeln('<body background="images/fondo5.gif" onLoad="RefreshPlugin();">');
doc.writeln('<p>');
doc.writeln('<Embed type="application/x-mplayer2"');
doc.writeln('  pluginspage="http://www.microsoft.com/windows/windowsmedia/"');
doc.writeln('  src="'+GetBaseURL()+audioName+'"');
if (play.arguments.length==2) {
  doc.writeln('  currentPosition='+play.arguments[1]);}
doc.writeln('  name="MediaPlayer"');
doc.writeln('  autoStart=1');
doc.writeln('  autoSize=1');
doc.writeln('  showDisplay=0');
doc.writeln('  showStatusBar=1');
doc.writeln('  showControls=1');
doc.writeln('  showTracker=1');
doc.writeln('  enableTracker=1');
doc.writeln('  showPositionControls=1');
doc.writeln('  enablePositionControls=1');
doc.writeln('  width=286');
doc.writeln('  height=71>');
doc.writeln('  </embed>');
doc.writeln('<'+'script language="javascript"'+'>');
doc.writeln('fPluginRunning=true;');
doc.writeln('function RefreshPlugin()');
doc.writeln('{');
doc.writeln('  navigator.plugins.refresh();');
doc.writeln('}');
doc.writeln('<'+'/script'+'>');
   }	
// Case 2: Netscape alone detected.  Attempt WMP v9 applet.  If
//         applet fails user will be asked to download WMP
else if (br=="Netscape") 
   {
doc.writeln('<body background="images/fondo5.gif" onLoad="CheckForApplet();">');
doc.writeln('<p>');
doc.writeln('<APPLET NAME="MediaPlayer" CODE="WMPNS.WMP" WIDTH="290" HEIGHT="68" MAYSCRIPT VIEWASTEXT>');
doc.writeln('  <PARAM NAME="URL" VALUE="'+GetBaseURL()+audioName+'">');
if (play.arguments.length==2) {
  doc.writeln('  <PARAM NAME="currentPosition" VALUE="'+play.arguments[1]+'">');}
doc.writeln('  <PARAM NAME="autoStart" VALUE="true">');
doc.writeln('  <PARAM NAME="enabled" VALUE="true">');
doc.writeln('  <PARAM NAME="balance" VALUE="50">');
doc.writeln('  <PARAM NAME="volume" VALUE="50">');
doc.writeln('  <PARAM NAME="uiMode" VALUE="full">');
doc.writeln('  </APPLET>');
doc.writeln('<script language="javascript">');
doc.writeln('fAppletRunning=true;');
doc.writeln('function CheckForApplet()');
doc.writeln('{');
doc.writeln('  navigator.plugins.refresh();');
doc.writeln('  if (!navigator.javaEnabled())');
doc.writeln('      alert("Java is not enabled.  Windows Media Player applet for Netscape requires a Java runtime.");');
doc.writeln('  if (!(document && document["MediaPlayer"])');
doc.writeln('      alert("cannot find Windows Media Player applet for Netscape.");');
doc.writeln('}');
doc.writeln('<'+'/script'+'>');
   }	
// Case 3: IE and WMP 7 or greater detected.		
else if (br=="IE" && pm>=7)
   {
doc.writeln('<body background="images/fondo5.gif">');
doc.writeln('<p>');
doc.writeln('<OBJECT ID="MediaPlayer"');
doc.writeln('  CLASSID=CLSID:6BF52A52-394A-11D3-B153-00C04F79FAA6');
doc.writeln('  standby="Loading Microsoft Windows Media Player components..."');
doc.writeln('  TYPE="application/x-oleobject" width="290" height="64" VIEWASTEXT>');
doc.writeln('  <PARAM NAME="url" VALUE="'+audioName+'">');
if (play.arguments.length==2) {
  doc.writeln('  <PARAM NAME="currentPosition" VALUE="'+play.arguments[1]+'">');}
doc.writeln('  <PARAM NAME="AutoStart" VALUE="true">');
doc.writeln('  <PARAM NAME="uiMode" VALUE="full">');
doc.writeln('</OBJECT>');
   }	
// Case 4: IE and WMP 6.4 detected.		
else if (br=="IE" && pm==6 && pn==4)
   {
doc.writeln('<body background="images/fondo5.gif">');
doc.writeln('<p>');
doc.writeln('<OBJECT ID="MediaPlayer" WIDTH=290 HEIGHT=68');
doc.writeln('  CLASSID="CLSID:22D6f312-B0F6-11D0-94AB-0080C74C7E95"');
doc.writeln('  STANDBY="Loading Windows Media Player components..."');
doc.writeln('  TYPE="application/x-oleobject" VIEWASTEXT>');
doc.writeln('  <PARAM NAME="FileName" VALUE="'+audioName+'">');
if (play.arguments.length==2) {
  doc.writeln('  <PARAM NAME="CurrentPosition" VALUE="'+play.arguments[1]+'">');}
doc.writeln('  <PARAM NAME="ShowStatusBar" VALUE="True">');
doc.writeln('  <PARAM NAME="AutoStart" VALUE="True">');
doc.writeln('  <PARAM NAME="AutoSize" VALUE="True">');
doc.writeln('  <PARAM NAME="ShowDisplay" VALUE="False">');
doc.writeln('  <PARAM NAME="ShowControls" VALUE="True">');
doc.writeln('  <PARAM NAME="ShowTracker" VALUE="True">');
doc.writeln('  <PARAM NAME="EnableTracker" VALUE="True">');
doc.writeln('  <PARAM NAME="ShowPositionControls" VALUE="True">');
doc.writeln('  <PARAM NAME="EnablePositionControls" VALUE="True">');
doc.writeln('</OBJECT>');
   }	   
// Default Case:  no player found, inform user.	
else	
   {
doc.writeln('<body background="images/fondo5.gif">');
doc.writeln('<p>');
doc.writeln('<font size="2" face="Trebuchet MS">Windows Media Player is required to play audio</font>'); 
   }		

doc.writeln('</p>');
doc.writeln('</body>');
doc.writeln('</html>');
doc.close();
player.focus();
}

//-----------------------------------------------------------------
// Name: closePlayerWin
// Purpose: close window opened by play function
//-----------------------------------------------------------------

function closePlayerWin() {
  if (player && player.open && !player.closed) player.close();
}

//-----------------------------------------------------------------
// Name: checkIE
// Purpose: check Internet Explorer version, display settings, warn if too low
//-----------------------------------------------------------------
function checkIE() { 
  var Browser=navigator.appName;
  if (br=="IE") { Browser=Browser+' '+bm+'.'+bn }
  else { Browser=Browser+' '+navigator.userAgent }
  var Screen=window.screen.width+' by '+window.screen.height;
  var S = 'To enjoy all the features of these pages,\x0a'
        + 'you should use Internet Explorer 5.5 or better,\x0a'
        + 'and a screen resolution of 1024 by 768 pixels;\x0a'
        + '\x0a';
  var ok=true;
  if (!(br=="IE" && (bm>5 || (bm==5 && bn==5)))) {
	S = S + 'you are using '+Browser+',\x0a';
	ok=false;
	}
  if (!(window.screen.width>=1024 && window.screen.height>=768)) {
	S = S + 'your screen resolution is '+Screen+'\x0a';
	ok=false;
	}
  if (!ok) alert(S+'\x0a');
}

var br = GetBrowser();        // Returns either "IE" or "Netscape"
var bm = GetIEMajorVer();     // Returns Internet Explorer major version #
var bn = GetIEMinorVer();     // Returns Internet Explorer minor version #