function changeLogo()
{
	var fn = imLogo.src.substring(imLogo.src.lastIndexOf("/") + 1);

	switch(fn)
	{
		case "logo6.jpg":
			imLogo.src = "images/logo1.jpg";
			break;
			
		case "logo1.jpg":
			imLogo.src = "images/logo2.jpg";
			break;			
		
		default:
			imLogo.src = "images/logo6.jpg";
			break;			
		
	}
}