gistfile1.js

function screenToSvg(svg, x, y) {
    var point = svg.createSVGPoint();
    point.x = x;
    point.y = y;

    var screenMatrix = svg.getScreenCTM();
    var svgMatrix = screenMatrix.inverse();

    return point.matrixTransform(svgMatrix);
}

$('svg').on('click', function(event) {
    var svgPoint = screenToSvg(this, event.clientX, event.clientY);
    console.log("Event:", event, "SVG point: ", svgPoint);
});