#alan {width:200px;}

#alan ul {margin:0;padding:0;}

#alan li {float:left;text-indent:-9999px; }

#alan ul li a{
width:200px;
height:50px;
display:block;
background:url("hakkinda.gif") no-repeat 0px 0px;
}

#alan ul li a:hover{
width:200px;
height:50px;
display:block;
background:url("hakkinda.gif") no-repeat 0px -50px;
}