In this topic you will add a simple JavaScript function in your source page and apply the JavaScript function name to the Hint object.

1. Add the following JavaScript function to your source page:

   To write code in Source View

   <script type="text/javascript">
       function hint() {
           return 'x:' + this.x + ',y:' + this.y + ",y1:" + this.data.y1;
       }
   </script>
   

2. In design view right-click on the C1BubbleChart and select Properties to open C1BubbleChart's Properties window.
3. Expand Hint->Content and set the Function property to Hint. This will apply the JavaScript function to the chart tooltip.
4. Expand ChartLabel and set the ChartLabelFormatString property to c2.