If you want to add a drop show to your image you can try the example below

<style type="text/CSS">

.tst {

background-color:#999999;

float:left;

position:relative;

}

.tst img {

display:block;

margin: -5px 5px 5px -5px;

position:relative;

}

</style>

<div class="tst">

<img src=tst.jpg>

</div>