<style>#img{
width:150px;
height:150px;
background:url("http://moisrex.rozblog.com/user/Avatar/moisrex/xt2.png") no-repeat;
transition: all 0.3s ease;
-moz-transition: all 0.3s ease;
-o-transition: all 0.3s ease;
-webkit-transition: all 0.3s ease;
-ms-transition: all 0.3s ease;
-khtml-transition: all 0.3s ease;
}
#img:hover{
width:150px;
height:150px;
background: url("http://moisrex.rozblog.com/user/Avatar/moisrex/smaeal.png") no-repeat;
transition: all 0.3s ease;
-moz-transition: all 0.3s ease;
-o-transition: all 0.3s ease;
-webkit-transition: all 0.3s ease;
-ms-transition: all 0.3s ease;
-khtml-transition: all 0.3s ease;
}
</style>
<a href="#" title="">
<div id="img"></div>
</a>