This is working in my browser:
<!DOCTYPE html>
<html>
<body>
<img src="http://nineplanets.org/planets.jpg"
onmouseover="this.src='http://nineplanets.org/planetorder.JPG';"
onmouseout="this.src='http://nineplanets.org/planets.jpg';">
</img>
</body>
</html>
But this is not working:
<!DOCTYPE html>
<html>
<body>
<img src="C:\Users\user\Desktop\WE\Pics\milk.png"
onmouseover="this.src='C:\Users\user\Desktop\WE\Pics\butter.png';"
onmouseout="this.src='C:\Users\user\Desktop\WE\Pics\milk.png';">
</img>
</body>
</html>
Please answer as soon as possible and path to my images is totally correct!!