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); } } }