<!--
/**
   * This method checks if all the characters in the string are
   * valid digits.
   */
function isNumeric(pString)
{
   var lAllowedCharacters = "0123456789";
   var lIsNumeric = true;
   var lCount = 0;

   while (lCount < pString.length)
   {
      if (lAllowedCharacters.indexOf(pString.charAt(lCount))< 0 )
      {
         lIsNumeric = false;
      }
      lCount++;
   }
   return lIsNumeric;
}
-->