function toggleVisibility(element) {
  if (element.style.display == "none") {
    element.style.display = "inline";
  } else {
    element.style.display = "none";
  }
}

function expandCollapse(element,showHideId) {
  var elementsToHide = element.childNodes;
  if (elementsToHide != null && elementsToHide.length > 0) {
     for (var i = 0; i < elementsToHide.length; i++) {
     	if (elementsToHide[i].className == showHideId) {
	       toggleVisibility(elementsToHide[i]);
	    }
	    expandCollapse(elementsToHide[i], showHideId);
     }
  }
}