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 hintContent() {
     return this.x + ' cm, ' + this.y + ' kg';
    }
   </script>
   

2. In design view, right-click on the C1ScatterChart and select Properties to open C1ScatterChart's Properties window.
3. Expand Hint->Content and set the Function property to hintContent. This will apply the JavaScript function to the chart tooltip.