function hideElement(element,image) {
  document.getElementById(element).style.display="none";
  document.getElementById(image).src="/img/expand.gif";
}


function showElement(element,image) {
  document.getElementById(element).style.display="";
  document.getElementById(image).src="/img/collapse.gif";
}

function hideOrShowElement(element,image) {
  if (document.getElementById(element).style.display == "none") {
    showElement(element,image);
  } 
  else { 
    hideElement(element,image);
  }
}