varBrowserName = "";
TransparenzCode = "";

function getTransCode(a) {
	varUserAgent = navigator.userAgent;
	varBrowserCheck = -1;

	if(varBrowserCheck == -1) {
		varBrowserCheck = varUserAgent.search('Firefox');
		if(varBrowserCheck != -1)
			varBrowserName = 'Firefox';
	}

	if(varBrowserCheck == -1) {
		varBrowserCheck = varUserAgent.search('MSIE');	
		if(varBrowserCheck != -1)
			varBrowserName = 'Microsoft Internet Explorer';
	}

	if(varBrowserCheck == -1) {
		varBrowserCheck = varUserAgent.search('Opera');	
		if(varBrowserCheck != -1)
			varBrowserName = 'Opera';
	}

	if(varBrowserCheck == -1) {
		varBrowserCheck = varUserAgent.search('Safari');	
		if(varBrowserCheck != -1)
			varBrowserName = 'Safari';
	}
	
	if(varBrowserName == 'Firefox') {
		TransparenzCode= '-moz-opacity: '+a+';';
	} 
	if(varBrowserName == 'Microsoft Internet Explorer') {
		TransparenzCode= 'filter: Alpha(opacity='+(a*100)+', finishopacity='+(a*100)+')';
	}
	if(varBrowserName == 'Safari') {
		TransparenzCode= '-khtml-opacity: '+a+';';
	}
	if(varBrowserName == 'Opera') {
		TransparenzCode= 'opacity: '+a+';';
	}
	
	return TransparenzCode;
}