addLoadEvent(ProtectImages);

function ProtectImages()
{
  var elements = document.getElementsByTagName("img");

  for (var i = 0; i < elements.length; i++)
  {
    elements[i].oncontextmenu = function()
    {
      alert("This photo is protected by copyright law. Please contact the photographer if you would like to use it.");
	  return false;
    }
  }
}