var message = "";
var ns4 = (document.layers)? true:false; ///NS 4 
var ie4 = (document.all)? true:false; //IE 4 
var dom = (document.getElementById)? true:false; //DOM

if (dom)
{
 if (document.addEventListener)
  document.addEventListener("mouseup",RightMouseDisable,false);
 else
  document.oncontextmenu = IsForbidden;
}
else if (ie4)
{
 document.onkeydown = CheckKey;
 document.onmousedown = RightMouseDisable;
 }
else if (ns4)
{
 document.captureEvents(Event.MOUSEDOWN);
 document.onmousedown = RightMouseDisable;
}

function CheckKey()
{
 var MyKey = event.keyCode;
 if (MyKey==93||MyKey==17)
 {
  var MyValue = IsForbidden;
  return false;
 }
}
  
function RightMouseDisable(e)
{
 var MyNumber=0;
 if (ie4)
  MyNumber = event.button;
 else
  MyNumber = e.which;
 if (MyNumber==2||MyNumber==3)
 {
  var MyValue = IsForbidden();
  return false;
 }
 else
  return true; 
}

function IsForbidden(){return false;}