function preview_open_popup(id, q) {
	popup = window.open("/cgi/sys/preview/preview.rbhtml?op=preview&ID="+id+"&string="+q,
	     "preview",
	     "toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width=850,height=750");

	if(popup.focus)
		popup.focus();

	return false;
}