function gtwin(str)
{
	switch (str) {
		case 1:
		URL = "http://media.roland.com/en/v/v0511/v051101M.mov";
		break;
		case 2:
		URL = "http://media.roland.com/en/v/v0511/v051102M.mov";
		break;
		case 3:
		URL = "http://media.roland.com/en/v/v0511/v051103M.mov";
		break;
		case 4:
		URL = "http://media.roland.com/en/v/v0511/v051104M.mov";
		break;
		case 5:
		URL = "http://media.roland.com/en/v/v0511/v051105M.mov";
		break;
		case 6:
		URL = "http://media.roland.com/en/v/v0511/v051106M.mov";
		break;
		case 7:
		URL = "http://media.roland.com/en/v/v0511/v051107M.mov";
		break;
		case 8:
		URL = "http://media.roland.com/en/v/v0511/v051108M.mov";
		break;
		case 9:
		URL = "http://media.roland.com/en/v/v0511/v051109M.mov";
		break;
		case 10:
		URL = "http://media.roland.com/en/v/v0511/v051110M.mov";
		break;
		case 11:
		URL = "http://media.roland.com/en/v/v0511/v051111M.mov";
		break;
	}
	window.open(URL,'gt','width=400,height=280');
}