function changeIframeHeight(id)
{
  var browserName=navigator.appName; 
  if (browserName=="Microsoft Internet Explorer") {
    top.document.getElementById(id).height = top.document.getElementById(id).Document.body.scrollHeight;
  } else {
    top.document.getElementById(id).height = top.document.getElementById(id).contentDocument.body.offsetHeight;
  }
}

function toggleDisplay(action, elID, iframeID)
{
  var obj = document.getElementById(elID);  
  if (action == 'hide') {
    obj.style.display = 'none';
  } else {
    obj.style.display = 'block';
  }
  changeIframeHeight(iframeID);
}