Events for the area. All events are a javascript functions.

Event	Description
click	Fires when the series is clicked. The this keyword refers to the series object itself. One parameter, event, is passed to the function. This contains common event information based on jQuery or MooTools depending on which library is used as the base for Highcharts. Additionally, event.point holds a pointer to the nearest point on the graph.
checkboxClick	Fires when the checkbox next to the series' name in the legend is clicked.. The this keyword refers to the series object itself. One parameter, event, is passed to the function. The state of the checkbox is found by event.checked. Return false to prevent the default action which is to toggle the select state of the series.
hide	Fires when the series is hidden after chart generation time, either by clicking the legend item or by calling .hide().
legendItemClick	Fires when the legend item belonging to the series is clicked. The this keyword refers to the series object itself. One parameter, event, is passed to the function. This contains common event information based on jQuery or MooTools depending on which library is used as the base for Highcharts. The default action is to toggle the visibility of the series. This can be prevented by returning false or calling event.preventDefault().
mouseOver	Fires when the mouse enters the graph. The this keyword refers to the series object itself. One parameter, event, is passed to the function. This contains common event information based on jQuery or MooTools depending on which library is used as the base for Highcharts.
mouseOut	Fires when the mouse leaves the graph. The this keyword refers to the series object itself. One parameter, event, is passed to the function. This contains common event information based on jQuery or MooTools depending on which library is used as the base for Highcharts. If the stickyTracking option is true, mouseOut doesn't happen before the mouse enters another graph or leaves the plot area.
show	Fires when the series is shown after chart generation time, either by clicking the legend item or by calling .show().