$(function () {
    // Set mouseDown event handler function
    $(".selector").wijbarchart({
        mouseDown : function (e, data) {
     
        }
    });
});

mouseDown = function ( 
   e : jQuery.Event,
   data : IBarChartEventArgs
) { };

Parameters

e

Standard jQuery.Event object.

data

An object that contains all the series information for the clicked bar.

data.bar: The Raphael object of the bar.

data.data: The data of the series of the bar.

data.hoverStyle: The hover style of the series of the bar.

data.index: The index of the bar.

data.label: The label of the series of the bar.

data.legendEntry: The legend entry of the series of the bar.

data.style: The style of the series of the bar.

data.type: "bar"

Reference

options type
wijbarchart Method