// Expand and Collapse sections of the Page

function expand(theSpan) {
  var expanded = theSpan.innerHTML=='[+]'
  theSpan.innerHTML=expanded?'[-]':'[+]';
  var container=theSpan.parentNode;
  var subDivs = container.getElementsByTagName('div');
  for (var i=0;i<subDivs.length;i++) {
    if (subDivs[i].parentNode==container) subDivs[i].style.display=(expanded)?'':'none'
  }
}