function gtwin(str)
{
	switch (str) {
		case 1:
		URL = "http://media.roland.com/en/v/v0552/v055208M.mov";
		break;
		case 2:
		URL = "http://media.roland.com/en/v/v0552/v055207M.mov";
		break;
		case 3:
		URL = "http://media.roland.com/en/v/v0552/v055206M.mov";
		break;
		case 4:
		URL = "http://media.roland.com/en/v/v0552/v055205M.mov";
		break;
		case 5:
		URL = "http://media.roland.com/en/v/v0552/v055204M.mov";
		break;
		case 6:
		URL = "http://media.roland.com/en/v/v0552/v055203M.mov";
		break;
		case 7:
		URL = "http://media.roland.com/en/v/v0552/v055202M.mov";
		break;
		case 8:
		URL = "http://media.roland.com/en/v/v0552/v055201M.mov";
		break;
	}
	window.open(URL,'gt','width=400,height=280');
}