if(document.all)
{
   document.onmousedown = disableclick
}
else if(document.layers)
{
   associateimages()
}

function associateimages()
{
   for(i = 0; i < document.images.length; i++)
      document.images[i].onmousedown=disableclick;
}

var message="This picture is copyright. Please do not attempt to download it. Thank you."
function disableclick(e)
{

   if(document.all)
   {
      if(event.button == 2 || event.button == 3)
      {
         if(event.srcElement.tagName == "IMG")
         {
            alert(message);
            return false;
         }
      }
   }
   if(document.layers)
   {
      if(e.which == 3)
      {
         alert(message);
         return false;
      }
   }
}

function pleaseStop(e)
{
    alert(message);
    return false;
}