PNG-Fallback for SVG-Images. Inspired by http://codepad.co/s/02aac9, but realized without jQuery-Dependency. Only Modernizr is needed.

svg-fallback.js

var rSvg = /\.(svg)$/;

if ( !Modernizr.svg ) {
  for ( var i = 0, img; img = document.images[i]; i +=1 ) {
    if ( !rSvg.test(img.src) ) continue;
    img.src = img.src.replace(rSvg, '.png');
  }
}