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   1  <public:component lightweight="true">
   2  
   3  <script language="javascript">
   4  
   5  function CheckIsDigit()
   6  {
   7      var iCode = event.keyCode ;
   8  
   9      event.returnValue =
  10          (
  11              ( iCode >= 48 && iCode <= 57 )        // Numbers
  12              || (iCode >= 37 && iCode <= 40)        // Arrows
  13              || iCode == 8                        // Backspace
  14              || iCode == 46                        // Delete
  15          ) ;
  16  
  17      return event.returnValue ;
  18  }
  19  
  20  this.onkeypress = CheckIsDigit ;
  21  
  22  </script>
  23  
  24  </public:component>