function IsSafari3() {
    if (window.devicePixelRatio && navigator.userAgent.match("Safari") && (navigator.userAgent.match("Version/3") || navigator.userAgent.match("Version/4"))) return true;
	return false;
}

function IsFirefox3() {
	if (navigator.oscpu && navigator.userAgent.match("rv:1\.9")) return true;
	return false;
}