function flashAv(req){
	requiredVersion = req;
	flash2Installed = false;
	flash3Installed = false;
	flash4Installed = false;
	flash5Installed = false;
	flash6Installed = false;
	maxVersion = 6;
	actualVersion = 0;
	hasRightVersion = false;
	
	isIE = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;	
	isWin = (navigator.appVersion.indexOf("Windows") != -1) ? true : false;
		
	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('</SCR' + 'IPT\> \n');
	}	
	
	if (navigator.plugins){
		if (navigator.plugins["Shockwave Flash 2.0"]
		|| navigator.plugins["Shockwave Flash"]){

			isVersion2 = navigator.plugins["Shockwave Flash 2.0"] ? " 2.0" : "";
			flashDescription = navigator.plugins["Shockwave Flash" + isVersion2].description;
			flashVersion = parseInt(flashDescription.charAt(flashDescription.indexOf(".") - 1));

			flash2Installed = flashVersion == 2;		
			flash3Installed = flashVersion == 3;
			flash4Installed = flashVersion == 4;
			flash5Installed = flashVersion == 5;
			flash6Installed = flashVersion == 6;
		}
	}
	
	for (i = 2; i <= maxVersion; i++) {	
		if (eval("flash" + i + "Installed") == true) actualVersion = i;
	}
	if(navigator.userAgent.indexOf("WebTV") != -1) actualVersion = 2;	
	
	if (actualVersion >= requiredVersion)
		return true;
	else return false;
}