function displaySection(sectionName) {
 if (document.getElementById(sectionName).style.display == 'none') {
  document.getElementById(sectionName).style.display = 'block';
  document.getElementById(sectionName + 'expand').innerHTML = "-";
 }
 else {
  document.getElementById(sectionName).style.display = 'none';
  document.getElementById(sectionName + 'expand').innerHTML = "+";
 }
}


function activateTab(tabName) {
 document.getElementById('tab1').style.borderBottomColor='black';
 document.getElementById('tab2').style.borderBottomColor='black';
 document.getElementById('tab3').style.borderBottomColor='black';
 document.getElementById('tab4').style.borderBottomColor='black';
 document.getElementById(tabName).style.borderBottomColor='#a5bfda';
 document.getElementById('tab1').style.fontWeight='normal';
 document.getElementById('tab2').style.fontWeight='normal';
 document.getElementById('tab3').style.fontWeight='normal';
 document.getElementById('tab4').style.fontWeight='normal';
 document.getElementById(tabName).style.fontWeight='bold';
 document.getElementById('tab1left').style.borderBottomColor='black';
 document.getElementById('tab2left').style.borderBottomColor='black';
 document.getElementById('tab3left').style.borderBottomColor='black';
 document.getElementById('tab4left').style.borderBottomColor='black';
 document.getElementById(tabName + 'left').style.borderBottomColor='#a5bfda';
 document.getElementById('tab1right').style.borderBottomColor='black';
 document.getElementById('tab2right').style.borderBottomColor='black';
 document.getElementById('tab3right').style.borderBottomColor='black';
 document.getElementById('tab4right').style.borderBottomColor='black';
 document.getElementById(tabName + 'right').style.borderBottomColor='#a5bfda';
 document.getElementById('tab1contents').style.display='none';
 document.getElementById('tab2contents').style.display='none';
 document.getElementById('tab3contents').style.display='none';
 document.getElementById('tab4contents').style.display='none';
 document.getElementById(tabName + 'contents').style.display='block';
}