//Testvariable
var flash=false;

//Geckotest
var plugin = (navigator.mimeTypes && navigator.mimeTypes["application/x-shockwave-flash"] ? navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin : 0);

if (plugin && parseInt(plugin.description.substring(plugin.description.indexOf(".")-1)) >= 6) {
     flash = true;
     }else{
     flash = false;
   }