<img> src change on hover.

Your images source:
Your images source on hover:
Desired image width:
Desired image height:

<img src="http://profile.ak.fbcdn.net/hprofile-ak-snc4/276906_284199811597368_1016142099_n.jpg" width="" height="" onmouseover="this.src='http://profile.ak.fbcdn.net/hprofile-ak-snc4/276906_284199811597368_1016142099_n.jpg'"
onmouseout="this.src='http://profile.ak.fbcdn.net/hprofile-ak-snc4/276906_284199811597368_1016142099_n.jpg'"/>