function open_course(cid) {
	// set new window attributes
	attributes = "width=780,height=500,resizable=yes,scrollbars=yes,toolbar=no,directories=no,status=yes,menubar=no,copyhistory=no";

	// open the new window to view the course details
	window.open('course_details.php?cid='+cid,'course',attributes);
}