var requiredVersion = 4;  
var useRedirect = false;    
var flashPage = "movie.html";   
var noFlashPage = "noflash.html"; 
var upgradePage = "upgrade.html"; 
var flash2Installed = false; 
var flash3Installed = false;
var flash4Installed = false;    
var flash5Installed = false;    
var flash6Installed = false;    
var maxVersion = 6;             
var actualVersion = 0;          
var hasRightVersion = false;    
var jsVersion = 1.0; 

function detectFlash() { 
  if (navigator.plugins) {
    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;
      var flashVersion = parseInt(flashDescription.charAt(flashDescription.indexOf(".") - 1));
      flash2Installed = flashVersion == 2;    
      flash3Installed = flashVersion == 3;
      flash4Installed = flashVersion == 4;
      flash5Installed = flashVersion == 5;
      flash6Installed = flashVersion >= 6;
    }
  }
  
  for (var i = 2; i <= maxVersion; i++) {  
    if (eval("flash" + i + "Installed") == true) actualVersion = i;
  }
  if(navigator.userAgent.indexOf("WebTV") != -1) actualVersion = 3;  
  if (actualVersion >= requiredVersion) {
    if (useRedirect) {
      if(jsVersion > 1.0) {
        window.location.replace(flashPage);  
      } else {
        window.location = flashPage;
      }
    }
    hasRightVersion = true;                
  } else {  
    if (useRedirect) {
      if(jsVersion > 1.0) {
        window.location.replace((actualVersion >= 2) ? upgradePage : noFlashPage);
      } else {
        window.location = (actualVersion >= 2) ? upgradePage : noFlashPage;
      }
    }
  }
}
detectFlash();