// Functions to test the availability of plugins
// Copyright Andante Corp. 2001
// By Guillaume Herisson - June 11th 2001

// #############################################
// these are the user defined globals
// modify the following variables to customize the inspection behaviour

var requiredVersion = 5;			// version the user needs to view site (max is 5, min is 2)
var useRedirect = false; 			// "true" loads new flash or non-flash page into browser
							// "false" embeds movie or alternate html code into current page

// set next three vars if useRedirect is true...
var flashPage = "flash.html";		// the location of the flash movie page
var noFlashPage = "noflash.html";	// send user here if they don't have the plugin or we can't detect it
var upgradePage = "upgrade.html";	// send user here if we detect an old plugin
// #############################################


// Do not modify the next values

var flash2Installed = false;		// boolean. true if flash 2 is installed
var flash3Installed = false;		// boolean. true if flash 3 is installed
var flash4Installed = false;		// boolean. true if flash 4 is installed
var flash5Installed = false;		// boolean. true if flash 5 is installed
var flash6Installed = false;		// boolean. true if flash 6 is installed
var flash7Installed = false;		// boolean. true if flash 7 is installed

var useFlashObject=true;

var maxVersion = 7;			// highest version we can actually detect
var actualVersion = 0;		      // version the user really has
var hasRightVersion = false;		// boolean. true if it's safe to embed the flash movie in the page
var jsVersion = 1.0;			// the version of javascript supported

// #############################################

// check the browser...we're looking for ie/win
var isIE = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;	    // true if we're on ie
var isWin = (navigator.appVersion.indexOf("Windows") != -1) ? true : false; // true if we're on windows

// this is a js1.1 code block, so make note that js1.1 is supported.
jsVersion = 1.1;

// #############################################

// write vbscript detection if we're not on mac.
if(isIE && isWin)
{ // don't write vbscript tags on anything but ie win
	document.write('<SCR' + 'IPT LANGUAGE=VBScript\> \n');
	document.write('on error resume next \n');
	document.write('flash2Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.2"))) \n');
	document.write('flash3Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.3"))) \n');
	document.write('flash4Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.4"))) \n');
	document.write('flash5Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.5"))) \n');	
	document.write('flash6Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.6"))) \n');	
	document.write('flash7Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.7"))) \n');	
	document.write('</SCR' + 'IPT\> \n'); // break up end tag so it doesn't end our script
}
else
{
 useFlashObject=false;
}

// #############################################

function chekForFlash()
{	
 if (navigator.plugins)
 {
 // does navigator.plugins exist?
  if (navigator.plugins["Shockwave Flash 2.0"] 	// yes>> then is Flash 2 
		|| navigator.plugins["Shockwave Flash"]) // or flash 3+ installed?
  {		
   // set convenient references to flash 2 and the plugin description
   var isVersion2 = navigator.plugins["Shockwave Flash 2.0"] ? " 2.0" : "";
   var flashDescription = navigator.plugins["Shockwave Flash" + isVersion2].description;
   // a flash plugin-description looks like this: Shockwave Flash 4.0 r5
   // so we can get the major version by grabbing the character before the period
   // note that we don't bother with minor version detection. do that in your movie with $version
   var flashVersion = parseInt(flashDescription.charAt(flashDescription.indexOf(".") - 1));

   // we know the version, now set appropriate version flags
   flash2Installed = flashVersion == 2;		
   flash3Installed = flashVersion == 3;
   flash4Installed = flashVersion == 4;
   flash5Installed = flashVersion == 5;
   flash6Installed = flashVersion == 6;
   flash7Installed = flashVersion == 7;
  }
 }
	
 // loop through all versions we're checking, and set actualVersion to highest detected version
 for (var i = 2; i <= maxVersion; i++) 
 {	
  if (eval("flash" + i + "Installed") == true) actualVersion = i;
 }
 // if we're on webtv, the version supported is 2 (pre-summer2000, or 3, post-summer2000)
 // note that we don't bother sniffing varieties of webtv. you could if you were sadistic...
 if(navigator.userAgent.indexOf("WebTV") != -1) actualVersion = 2;	
	
 // uncomment next line to display flash version during testing
 //alert("version detected: " + actualVersion);

 // we're finished getting the version. time to take the appropriate action

 if (actualVersion >= requiredVersion) // user has a new enough version
 { 		
  hasRightVersion = true;  // flag: it's okay to write out the object/embed tags later

  if (useRedirect) // if the redirection option is on, load the flash page
  {							
   if (jsVersion > 1.0) // need javascript1.1 to do location.replace
   {					
    window.location.replace(flashPage);	// use replace() so we don't break the back button	
   } 
   else 
   {
    window.location = flashPage;		// otherwise, use .location
   }
  }
 } 
 else // user doesn't have a new enough version.
 {	
  if (useRedirect) // if the redirection option is on, load the appropriate alternate page
  {		
   if(jsVersion > 1.0) // need javascript1.1 to do location.replace
   {	
    window.location.replace((actualVersion >= 2) ? upgradePage : noFlashPage);
   } 
   else 
   {
    window.location = (actualVersion >= 2) ? upgradePage : noFlashPage;
   }
  }
 }
 return hasRightVersion ;
}