/**
 * Converts the x values of the series from years to month.
 * This function just divides the x values through 12.
 * 
 * @param diagram:
 * The diagram containing the series to convert.
 */
function convertXValueFromYearsToMonth (diagram) {
   /* ======================================== */
   // IMPORTS:
   importPackage(org.jfree.data.xy);
 
   // get the dataset
   var dataset = diagram.getChart().getXYPlot().getDataset();
   var tempList = new LinkedList();
 
   // convert all series of the dataset at the given positions
   for (var seriesIter = dataset.getSeries().iterator(); seriesIter.hasNext(); ){
      /* ---------------------------------------- */
      var series = seriesIter.next();
 
      // clear and fill the template list with the new XYDataItems
      tempList.clear();
      for (var itemIter = series.getItems().iterator(); itemIter.hasNext(); ) {
         var _item = itemIter.next();
         tempList.add(new XYDataItem(_item.getXValue() / 12, _item.getYValue()));
      }
 
      // clear and fill the series with the items of the template list
      series.clear();
      for (var itemIter = tempList.iterator(); itemIter.hasNext(); ) {
         series.add(itemIter.next());
      }
      /* ---------------------------------------- */
   }
   /* ======================================== */
}