// From: http://www.webreference.com/programming/css_content/index.html
function SectionManager() {
  this.dsp = function(loc) {
    if (document.getElementById) {
      var foc = loc.firstChild;
      foc = loc.firstChild.innerHTML
          ? loc.firstChild
          : loc.firstChild.nextSibling;
      foc.innerHTML = foc.innerHTML == '+' ? '-' : '+';
      foc = loc.parentNode.nextSibling.style
          ? loc.parentNode.nextSibling
          : loc.parentNode.nextSibling.nextSibling;
      foc.style.display = foc.style.display == 'block' ? 'none' : 'block';
    }
  }
  this.init = function() {
    if (!document.getElementById)
       document.write('<style type="text/css"><!--\n'+
          '.dspcont{display:block;}\n'+
          '//--></style>');
  }
}