onchartclick event (Chart)
The onchartclick event is activated when a section of a chart widget is clicked. This event can be specified by either a JavaScript expression, or a JavaScript function name.
If the name of a function is specified, the function will receive a single argument. For single-series charts, the argument is a string with the name of the clicked chart section. For multi-series charts the argument is an object with properties "name" and "category" which give the data set / series name and category name.
If a JavaScript expression is used, special variables name and category (for multi-series charts) will be available to the expression.
Example:
onchartclick: alert("You clicked on: " + name);