function CheckString(strName)
  {if (strName.length > 0) {return true;} else {return false;}}

function CheckPosNumber(strName)
  {if (parseFloat(strName) >= 0) {return true;} else {return false;}}

function CheckDate(dtmName)
  {if (dtmName.length <= 0) {return false;}
  else
    {if (Date.parse(dtmName) != Date.parse(dtmName)) {return false;}}}