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