anchor.diff:    {
       String pair =currencyPairs[$['menuPair'].selected];
       mainChart = $['mainChart'];
  +
  +
       String chartTitle="Daily Rates for "+pair;
       var options = {
         'title':chartTitle,
  
positive.code:   }
    sendMessage(Event e)
    {
      window.alert(e.type);
    }
  
    loadChartDialog(Event e)
  
negative.code:     btnCharts =$['btnCharts'];
      startDate =$['startDate'];
      endDate =$['endDate'];
  
      selectPair.on['tap'].listen(loadChartDialog);
      btnCharts.on['tap'].listen(loadChart);
      loadCurrencyPairs();
  