A cross browser fallback if svg is not supported.

svg-to-png-fallback.js

if(!document.implementation.hasFeature("http://www.w3.org/TR/SVG11/feature#Image", "1.1")) {
	var imgs = document.getElementsByTagName('img');
	var svgExtension = /.*\.svg$/
	var l = imgs.length;
	for(var i = 0; i < l; i++) {
		if(imgs[i].src.match(svgExtension)) {
			imgs[i].src = imgs[i].src.slice(0, -3) + 'png';
			console.log(imgs[i].src);
		}
	}
}