You can set an image to be used as the border around your menu. Code:
<script type="text/javascript" src="./MyMenu1/MyMenu1.js"></script>
<div id="MyMenu1"></div>
<style type="text/css">
.ImageBorder
{
border:solid 26px transparent;
-webkit-border-image: url(./Images/Border.png) 30 round;
-o-border-image: url(./Images/Border.png) 30 round;
border-image: url(./Images/Border.png) 30 round;
background-color:#C2C2C2;
}
</style>
<script type="text/javascript">
dm.ApplyCSS('MyMenu1','ImageBorder');
</script>