function getOS()
{

	var agt      = navigator.userAgent;
	var platform = navigator.platform;

	
	if(platform.indexOf('Mac') != -1)
	{
		//
		// When Mac OS X pages exist, return
		// appropriate string.
		//
		if (platform.indexOf('Mac OS X'))
		{
			return "Mac";
		}
		else
		{
			return "Mac";
		}
	}
	else
	{
		//
		// Default to windows.
		//
		return "Win";
	}

}