function openPageDescription(pageId) {

  var pageStyleObj = document.getElementById(pageId);
  var imgId = pageId + "_img";
  var imgObj = document.getElementById(imgId);

  if (pageStyleObj.style.display == 'inline') {
    pageStyleObj.style.display = 'none';
    imgObj.src = "http://www.reece.com.au/new/images/stats/open.jpg";
  }
  else {
    pageStyleObj.style.display = 'inline';
    imgObj.src = "http://www.reece.com.au/new/images/stats/close.jpg";
  }
}