immagini roll over

<div id="divK" style="position: absolute;
background-image= "images/rollover1.jpg";
onmouseover="imSwapImg(this,'images/100_4.jpg')"
onmouseout="imSwapImg(this,'images/rollover1.jpg')"
>
<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;KolAsim
</div>

#divK {
background: url('../images/rollover1.jpg');
background-repeat: no-repeat;
border-top: 5px solid #A8A8A8;
border-left: 5px solid #A8A8A8;
border-right: 5px solid #A8A8A8;
border-bottom: 5px solid #A8A8A8;
width:200px;
height: 200px;}
}