code: function parseRowPlaceHolders( row, str ) {
    //TODO
    log( "PoNG-Table",  "Start value: "+ str );
    while ( str.indexOf( "${" ) >= 0 && str.indexOf( "${" ) < str.indexOf( "}" ) ) {
      var plcHldStart = str.indexOf( "${" );
      var plcHldEnd   = str.indexOf( "}" );
      var varStr = str.substr( plcHldStart + 2,  plcHldEnd - plcHldStart - 2 );
      log( "PoNG-Table",  'parsePlaceHolders "'+varStr+'"' );
      str = str.substr( 0, plcHldStart ) +  getSubData(row,varStr) + str.substr( plcHldEnd+1 );  
    }
    log( "PoNG-Table", "Processed value: "+ str );
    return str;
  }
docs: replaces ${xyz} in str by the value of the input text field with ID xyz