		<!-- Videos collapsible page: makes information tree collapsible -->
		var myvar;
		function menuinit() {
				document.getElementById('m1').style.display = 'none';
				document.getElementById('m2').style.display = 'none';
				document.getElementById('m3').style.display = 'none';
				document.getElementById('m4').style.display = 'none';
				document.getElementById('m5').style.display = 'none';
				document.getElementById('m6').style.display = 'none';
				document.getElementById('m7').style.display = 'none';
				document.getElementById('m8').style.display = 'none';
				document.getElementById('m9').style.display = 'none';
				document.getElementById('m10').style.display = 'none';
				document.getElementById('m11').style.display = 'none';
				document.getElementById('m12').style.display = 'none';		
				document.getElementById('m13').style.display = 'none';	
			document.getElementById('pm1').src = '../images/plus.png';
			document.getElementById('pm2').src = '../images/plus.png';
			document.getElementById('pm3').src = '../images/plus.png';
			document.getElementById('pm4').src = '../images/plus.png';
			document.getElementById('pm5').src = '../images/plus.png';
			document.getElementById('pm6').src = '../images/plus.png';
			document.getElementById('pm7').src = '../images/plus.png';
			document.getElementById('pm8').src = '../images/plus.png';
			document.getElementById('pm9').src = '../images/plus.png';
			document.getElementById('pm10').src = '../images/plus.png';
			document.getElementById('pm11').src = '../images/plus.png';
			document.getElementById('pm12').src = '../images/plus.png';
			document.getElementById('pm13').src = '../images/plus.png';
		}
		function video_expand (i) {
				menuinit();
				if (myvar == i) {
				document.getElementById('p' + i).src = '../images/plus.png';
				document.getElementById(i).style.display = 'none';
				myvar = '';
			}
				else {
				document.getElementById('p' + i).src = '../images/minus.png';
				document.getElementById(i).style.display = 'block';
				myvar = i;
			}
		}
		<!-- /collapsible -->


		<!-- Courses collapsible page: makes information tree collapsible -->
		var myvar;
		function courses_tree() {
				document.getElementById('c1').style.display = 'none';
			document.getElementById('pc1').src = '/../../images/plus.png';
		}
		function course_expand (i) {
				courses_tree();
				if (myvar == i) {
				document.getElementById('p' + i).src = '/../../images/plus.png';
				document.getElementById(i).style.display = 'none';
				myvar = '';
			}
				else {
				document.getElementById('p' + i).src = '/../../images/minus.png';
				document.getElementById(i).style.display = 'block';
				myvar = i;
			}
		}
		<!-- /collapsible -->