How to add Image into the Menu created using Sitemap

[Lakul]

Hi,

I have created Menu using Sitemap.

SITEMAP CODE

 <siteMapNode title="MainMenuItem">                 
                  <siteMapNode controller="subController1" action="Index" title="SubMenu1"/>
                  <siteMapNode controller="subController2" action="Index" title="SubMenu2" />
                  <siteMapNode controller="subController3" action="Index" title="SubMenu3" />
  </siteMapNode>

Telerik Code is:
 Html.Telerik().Menu().Name("MyMenu").BindTo("web").Orientation(MenuOrientation.Vertical).Render()

how can i add image to MainMenuItem or SubMenuItem of Menu

Thanks,
Lakul