is use of sprite needs more code change

[Cypezette]

\[code\]<td class="cl1"> <a href="http://stackoverflow.com/questions/12759071/a1.php"> <img border="0" src="http://stackoverflow.com/questions/12759071/a.jpg" alt="alt1"> </a>\[/code\]Now I decided to use sprite and I created a sprite and my class is \[code\]sp1\[/code\] contains image \[code\]a.jpg\[/code\]So I changed the code to be:\[code\]<a> <td class="cl1 sp1"> </td>\[/code\]But when I use this image it appears fine but the margins are affected.So when I'm using sprites, do I need to change other code as well?