// JavaScript Document
function toggleElement(child,parent){
  c = document.getElementById(child);
  p = document.getElementById(parent);
  if(c.style.display == 'none' || c.style.display == ''){
    c.style.display = 'block';
    p.className = 'collapsible expanded';
  } else{
    c.style.display = 'none';
    p.className = 'collapsible';
  }
}