function initShowHide() {  
  linkArray = document.getElementsByTagName("h4")
  for (var i=0; i<linkArray.length; i++){
    linkArray[i].previousSibling.onclick = show;
	linkArray[i].previousSibling.previousSibling.onclick = hide;
	linkArray[i].nextSibling.style.display = 'none'
  }	
}

function show() {
	 this.nextSibling.nextSibling.style.display ='block';
	 return false;
}

function hide() {
	 this.nextSibling.nextSibling.nextSibling.style.display ='none';
	 return false;
}