// This requires a png image with the same filename as the svg
(function () {
    'use strict';

    var supportsSVG = function () {
            return document.implementation.hasFeature(
                        'http://www.w3.org/TR/SVG11/feature#Image',
                        '1.1'
                    );
        };

    if (!supportsSVG()) {
        $(function () {
            var imgs = document.getElementsByTagName('img');

            $('html').addClass('no-svg');

            if (!imgs.length) {
                imgs = document.getElementsByTagName('IMG');
            }

            for (var i = 0, n = imgs.length; i < n; i++) {
                var img = imgs[i],
                    src = img.getAttribute('src');

                // is the image an svg or svgz?
                if (/svgz?$/.test(src)) {
                    img.setAttribute('src', src.replace(/\.svgz?$/, '.png'));
                }
            }
        });
    }
})();