<!DOCTYPE html> <html> <body> <img id="myImg" src="/static/demo/images/eg_bulboff.gif" /> <br><br> <button onclick="document.getElementById('myImg').src='/static/demo/images/eg_bulbon.gif'">On</button> <button onclick="document.getElementById('myImg').src='/static/demo/images/eg_bulboff.gif'">Off</button> </body> </html>