//============================================================
//Script:    Basic No-Right-Click Script
//Functions: Blocks right-click on mouse and shows alert box
//Browsers:  NS & IE 4.0 & later; degrades gracefully
//============================================================
  var nav4 = true;
  document.onmousedown = disableMouse;
  document.onkeypress = disableKey;
  document.oncontextmenu=new Function("return false");

  if(window.history.forward(1) != null) window.history.forward(1);

  function disableMouse(e)
  {
    if(e) nav4=true;
    else nav4=false;
    //alert("nav=="+nav4);
  }

  function disableKey(e)
  {
    if(e) nav4=true;
    else nav4=false;
    if(nav4)
    {
     if(e.which==13)
     return false;
    }
    else
    {
     if(window.event.keyCode==13)
     return false;
    }
  }