function change_db(dataset){


					document.getElementById('dataGate').style.display = "none";
					document.getElementById('dataLists2').style.display = "none";
					document.getElementById('dataPresynaptome').style.display = "none";
					document.getElementById('dataNeuronal').style.display = "none";
					document.getElementById('dataAdhesome').style.display = "none";
					document.getElementById('dataIscMid').style.display = "none";
					document.getElementById('dataKEA').style.display = "none";
					document.getElementById('dataGenes2').style.display = "none";
					document.getElementById('dataPathway').style.display = "none";
					document.getElementById('dataChEA').style.display = "none";
					document.getElementById('dataPNAS').style.display = "none";
					document.getElementById('dataNeuro2A').style.display = "none";
					
											
					document.getElementById(dataset).style.display = "block";
				}	
				
function change_course(course){


					document.getElementById('courseOverview').style.display = "none";
					document.getElementById('cancerOver').style.display = "none";
					document.getElementById('cancerProbSet').style.display = "none";
					document.getElementById('cancerClass1').style.display = "none";
					document.getElementById('cancerClass2').style.display = "none";
					document.getElementById('cancerClass3').style.display = "none";
					document.getElementById('cancerClass4').style.display = "none";
					document.getElementById('cancerClass5').style.display = "none";
					document.getElementById('cancerClass6').style.display = "none";
					document.getElementById('cancerClass7').style.display = "none";
					document.getElementById('cancerClass8').style.display = "none";
					document.getElementById('cancerClass9').style.display = "none";
					document.getElementById('cancerClass10').style.display = "none";
					
					
					document.getElementById('diabetesOver').style.display = "none";
					document.getElementById('diabetesText').style.display = "none";
					document.getElementById('diabetesProbSet').style.display = "none";
					document.getElementById('diabetesClass1').style.display = "none";
					document.getElementById('diabetesClass2').style.display = "none";
					document.getElementById('diabetesClass3').style.display = "none";
					document.getElementById('diabetesClass4').style.display = "none";
					document.getElementById('diabetesClass5').style.display = "none";
					document.getElementById('diabetesClass6').style.display = "none";
					document.getElementById('diabetesClass7').style.display = "none";
					document.getElementById('diabetesClass8').style.display = "none";
					document.getElementById('diabetesClass9').style.display = "none";
					document.getElementById('diabetesClass10').style.display = "none";
											
					document.getElementById(course).style.display = "block";
				}