function md(e) 
{ 


  try { if (event.button==2||event.button==3) return false; }  
  catch (e) { if (e.which == 3) return false; } 
}
var popup="Sorry, right-click is disabled.";
document.oncontextmenu = function() { alert(popup); return false; }
document.ondragstart   = function() { alert(popup); return false; }
document.onmousedown   = md;