<style type="text/css">
div.borderstyle4 {
padding:10px 15px;
border:6px solid #ccc;
border-bottom-style:dotted;
border-top-style:dotted;
}
</style>
<div class="borderstyle4">
border:6px solid #ccc;
border-bottom-style:dotted;
border-top-style:dotted;
</div>