Uncaught TypeError: Cannot read property 'draw' of undefined

[Gfy]

Saw this error in Opera:

Uncaught TypeError: Cannot read property 'draw' of undefined

javascript2.js?975:1360

        // redraw on container resize
        var currentWidth = $("#main").width();
        $(window).resize(function () {
            if (currentWidth != $("#main").width()) {
                chart.draw(data, options);
                currentWidth = $("#main").width();
            }
        });

Looks like chart stays undefined when not on a statistics page.