function display(toDisplay){
  displayContainer = document.getElementById(toDisplay);
  if(displayContainer.style.display != "block"){displayContainer.style.display = "block";}
  else{displayContainer.style.display = "none";} 
}

function displayBlock(toDisplay){
  displayContainer = document.getElementById(toDisplay);
  displayContainer.style.display = "block";
}

function displayNone(toDisplay){
  displayContainer = document.getElementById(toDisplay);
  displayContainer.style.display = "none"; 
}