how to change colour when mouse hovers menu list?

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ASP.NET

how to write code in stylesheet when mouse scrolls over the menu items? pls provide code for this specifically bcz i hav already tried different methods.

im not used to javascript or jquery. normally how to write css code for this?

<div id="body">
           <asp:ContentPlaceHolder runat="server" ID="FeaturedContent">

               <div id='cssmenu' class="column">
                   <ul>

                         <li ><a href="abc.aspx"><span>View Stock</span></a>

                       </li>
                      <li><a href="rrr.aspx"><span>Used Stock</span></a>

                          </li>
                       <li class='last'><a href="yyy.aspx"><span>Taken Back Stock</span></a>

                       </li>
                       <li class='last'><a href="jjj.aspx"><span>Expired Stock </span></a>


                       </li>

                   </ul>

               </div>
           </asp:ContentPlaceHolder

>