function disableRightClick(e)
{
  var message = "Please view our legal pages about the use of images from this website.";
  if(!document.rightClickDisabled) // initialize
  {
    if(document.layers) 
    {
      document.captureEvents(Event.MOUSEDOWN);
      document.onmousedown = disableRightClick;
    }
    else document.oncontextmenu = disableRightClick;
    return document.rightClickDisabled = true;
  }
  if(document.layers || (document.getElementById && !document.all))
  {
    if (e.which==2||e.which==3)
    {
      alert(message);
      return false;
    }
  }
  else
  {
    alert(message);
    return false;
  }
}
disableRightClick();

function popUp(url, name, attributes)
{window.open(url, name, attributes);
}
<!-- Expandable Content header start -->
var ie4 = false; if(document.all) { ie4 = true; }
function getObject(id) { if (ie4) { return document.all[id]; } else { return document.getElementById(id); } }
function toggle(link, divId) { var lText = link.innerHTML; var d = getObject(divId);
 if (lText == '+') { link.innerHTML = '-'; d.style.display = 'block'; }
 else { link.innerHTML = '+'; d.style.display = 'none'; } }
<!-- Expandable Content header end   -->