[Deff]

На jQuery

<script src="http://code.jquery.com/jquery-latest.js"></script>

<style>	
#menu {
margin-top: -5px;
width: 180px;
height: 60px;
background-repeat : no-repeat;}

#menu span {
text-align:left;
display:block;
color:#000000;
margin: 7px 0;
padding: 11px;
}
#submenu, #menu span {
    border-radius:5px;
    -webkit-border-radius:5px;
    -khtml-border-radius:5px;
    -moz-border-radius:5px;
    -o-border-radius:5px;
background:#efeff0;
}

#menu .tabactive {
color: #000000;
    background:#777777;
}

#submenu {
padding: 3px;
height: 180px;
text-align: center;
font-size: 12px;
width: 540px;
}

.submenutext {
display: none; 
height: 40px;
}
</style>

<center><table id="tbl" style="width: 800px">
 <tbody>
  <tr>
   <td valign=top>
    <div id="menu"> <b>
<span alt="#sm1" style="cursor: pointer;">Добро пожаловать</span>
<span alt="#sm2" style="cursor: pointer;">Новости форума</span>
<span alt="#sm3" style="cursor: pointer;">Администрация</span>
<span alt="#sm4" style="cursor: pointer;">Баннеры партнеров</span>
           </b>
    </div>
   </td>
   <td id="MenuTxT"  align="center" valign="top">
    <div id="submenu" align="center"> 
     <div id="sm1" class="submenutext" style="display:block;">
<br/><br/>
текст добро пожаловать
</div>
     <div id="sm2" class="submenutext"><br /><br />
текст новости форума
</div>
     <div id="sm3" class="submenutext"><br /><br />
текст Администрация
</div>
     <div id="sm4" class="submenutext"><br /><br />
текст баннеры партнеров
</div>

</div>
   </td>
</tr>
 </tbody>
</table></center>





<script type="text/javascript">
$(document).ready(function() {
$("#MenuTxT div.submenutext").hide();

$("#MenuTxT div.submenutext:first").show();
$("#menu span").click(function() {
    $("#menu span").removeClass("tabactive");
    $(this).addClass("tabactive");
    $("#MenuTxT div.submenutext").hide();
    var activeDiv = $(this).attr("alt");
    $(activeDiv).fadeIn();
    return false; });
});
</script>

span alt=