Lab 16 Change an image by moving the mouse

1. Design a webpage to display picture A initially. 
2. Try to move the mouse. When the mouse is not within the area of the picture, picture A remains the same. When the mouse is within the area of the picture, display picture B in place.

You can use the photo in
 http://minstral.blogspot.tw/2013/06/blog-post.html 
for picture A and the photo in
 http://minstral.blogspot.tw/2013/05/blog-post_30.html 
for picture B.

Hint: You may find the example useful.
Hint: If you have a problem displaying a picture on the browser, you can check out the example.