Kittify Eryfing!

javascript:(function kitify(){var imgs=document.getElementsByTagName("img"), i, img, w, h;for(i=0;i<imgs.length;i++){img=imgs[i];w=img.width;h=img.height;img.src="http://placekitten.com/"+w+"/"+h;img.width=w;img.height=h};return void 0;})()