var key;
   if (window.event)
          key = window.event.keyCode;
    else if (e)
          key = e.which;
    switch(key)
    {
    //Digit Code
    case 48:{window.event.keyCode='1632'; return true;}
    case 49:{window.event.keyCode='1633'; return true;}
    case 50:{window.event.keyCode='1634'; return true;}
    case 51:{window.event.keyCode='1635'; return true;}
    case 52:{window.event.keyCode='1636'; return true;}
    case 53:{window.event.keyCode='1637'; return true;}
    case 54:{window.event.keyCode='1638'; return true;}
    case 55:{window.event.keyCode='1639'; return true;}
    case 56:{window.event.keyCode='1640'; return true;}
    case 57:{window.event.keyCode='1641'; return true;}
   }