TABLE centreren.

Hoe moet ik mijn inlogsysteem op mijn beginpagina nou op mijn site centreren?
site: www.xms2.co.cc

code:

<div id="side-2"><div class="block">
          <div class="head"></div>
          <table>
             <div class="name"><span><B>Inloggen</B></span></div>

                    <table width="100%" height="100%">
                        <tr>
                       Cpanel Log-In
                       <form enctype="application/x-www-form-urlencoded" action="http://cpanel.xms2.co.cc/auth" method="post">
<p class="element">
<label for="email">Email address</label><br/>
<input type="text" name="email" id="email" value="" placeholder="E-mail"></p>
<p class="element">
<label for="password">Password</label><br/>
<input type="password" name="password" id="password" value="" placeholder="Password"></p>

<input type="submit" name="submit" id="submit" value="Login"></form>
Webmail Log-in
<form enctype="application/x-www-form-urlencoded" action="http://webmail.xms2.co.cc" method="post">
<p class="element">
<label for="email">Email address</label><br/>
<input type="text" name="email" id="email" value="" placeholder="E-mail"></p>
<p class="element">
<label for="password">Password</label><br/>
<input type="password" name="password" id="password" value="" placeholder="Password"></p>

<input type="submit" name="submit" id="submit" value="Login"></form>
Password re-set 
<form enctype="application/x-www-form-urlencoded" action="http://cpanel.xms2.co.cc/auth/remind" method="post">
<p class="element">
<label for="email">Email address</label><br/>
<input type="text" name="email" id="email" value=""></p>

<input type="submit" name="submit" id="submit" value="Reset"></form>
                        </tr>
                    </table>
                </div>

                          </tr>
          </table>
        </div>

<div id="side-2"><div class="block">
          <div class="head"></div>
          <table>
             <div class="name"><span><B>Inloggen</B></span></div>

                    <div align="center"><table width="100%" height="100%">
                        <tr><td>
                       Cpanel Log-In
                       <form enctype="application/x-www-form-urlencoded" action="http://cpanel.xms2.co.cc/auth" method="post">
<p class="element">
<label for="email">Email address</label><br/>
<input type="text" name="email" id="email" value="" placeholder="E-mail"></p>
<p class="element">
<label for="password">Password</label><br/>
<input type="password" name="password" id="password" value="" placeholder="Password"></p>

<input type="submit" name="submit" id="submit" value="Login"></form>
Webmail Log-in
<form enctype="application/x-www-form-urlencoded" action="http://webmail.xms2.co.cc" method="post">
<p class="element">
<label for="email">Email address</label><br/>
<input type="text" name="email" id="email" value="" placeholder="E-mail"></p>
<p class="element">
<label for="password">Password</label><br/>
<input type="password" name="password" id="password" value="" placeholder="Password"></p>

<input type="submit" name="submit" id="submit" value="Login"></form>
Password re-set 
<form enctype="application/x-www-form-urlencoded" action="http://cpanel.xms2.co.cc/auth/remind" method="post">
<p class="element">
<label for="email">Email address</label><br/>
<input type="text" name="email" id="email" value=""></p>

<input type="submit" name="submit" id="submit" value="Reset"></form>
                        </td></tr>
                    </table>
                </div>

                          </tr>
          </table></div>
        </div>

was het niet..
heb zelf al opgelost met begin
en eind

dat is niet xhtml-valid?

nee, het is al gelukt