//usage e.g.:
//<script type="text/javascript" language="JavaScript" src="checkinhoud.js"></script>
// [...]
//if (detectFlash(5)) do_something();  // check for flash 5 or newer.

var flash2Installed = false;
var flash3Installed = false;
var flash4Installed = false;
var flash5Installed = false;
var flash6Installed = false;
var flash7Installed = false;
var flash8Installed = false;
var flash9Installed = false;
var flash10Installed = false;
var maxVersion = 10;             // highest version we can actually detect
var actualVersion = 0;
var hasRightVersion = false;
var jsVersion = 1.0;            // the version of javascript supported

var isIE = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;
var isWin = (navigator.appVersion.indexOf("Windows") != -1) ? true : false;

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

// IE on Windows doesn't support regular JavaScript plugins array detection.
if(isIE && isWin){
  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('flash8Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.8"))) \n');  
  document.write('flash9Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.9"))) \n');  
  document.write('flash10Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.10"))) \n');  
  document.write('</SCR' + 'IPT\> \n'); // break up end tag so it doesn't end our script
}

// Flashdetection has been put in a function, so it loads before it runs.
function detectFlash(requiredVersion)
{  
  if (navigator.plugins)
  {
    // check for flash 2 or flash 3+.
    if (navigator.plugins["Shockwave Flash 2.0"]
        || navigator.plugins["Shockwave Flash"]) {

      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
      // We can get the major version by grabbing the character before the period
      var flashVersion = parseInt(flashDescription.substr(flashDescription.indexOf(".") - 2, 2));
      flash2Installed = flashVersion == 2;    
      flash3Installed = flashVersion == 3;
      flash4Installed = flashVersion == 4;
      flash5Installed = flashVersion == 5;
      flash6Installed = flashVersion == 6;
      flash7Installed = flashVersion == 7;
      flash8Installed = flashVersion == 8;
      flash9Installed = flashVersion == 9;
      flash10Installed = flashVersion >= 10;
    }
  }
  
  // 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(navigator.userAgent.indexOf("WebTV") != -1) actualVersion = 3;  
  
  // return true if the user has a new enough version...
  return (actualVersion >= requiredVersion);
}