on moving from one web page to another web page ..the curren

on moving from one web page to another web page ..the current web page menu should be hidden:-eg:
after clicking on href="sale.aspx" the menu of that link that is "sale" has to disappear and other menus should appear and same way after clicking on href="Anniversary.aspx" the menu of that link that is "Anniversary Sale" has to disappear and other menus should appear...can anyone help me.

<tr>
        <td style="height: 24px; width:965px">
 
<div id="header" style="width: 936px">
 <a href="Home.aspx">Home</a><span>|</span>
              <a href="sale.aspx">Sale</a> <span>|</span>
                <a href="Annishow.aspx">Anniversary Sale</a><span>|</span>
                <a href="Forsale.aspx">Items For Sale </a> <span>|</span>
                 <a href="Saleinfo.aspx">Inform us a Sale</a> <span>|</span>