To see the left paw in action, apply the javascript (in blue below) and then click on the doggy pic. : )
INSTRUCTIONS:
Select and copy the code in blue below. Press [F12] to open the developer tools and click the ELEMENTS, INSPECTOR or DOM EXPLORER tab, then click the CONSOLE tab. Paste the code in at the prompt (CTRL + V) and hit enter, or click the green play button if using IE, then close the dev tools window [X]. May not work in all browsers.
function flip(){this.style.transition = "5s";
this.style.transform = "scale(-1,1)";
this.style.oTransition = "5s";
this.style.oTransform = "scale(-1,1)";
this.style.msTransition = "5s";
this.style.msTransform = "scale(-1,1)";
this.style.webkitTransition = "5s";
this.style.webkitTransform = "scale(-1,1)";
this.style.mozTransition = "5s";
this.style.mozTransform = "scale(-1,1)"};
$$("img")[30].onclick = flip;
$$("img")[38].onclick = flip;