How can i center de menu ???

thnx , Tommie
/* Bluespace Menu
---------------------------------------- */
.nav_menu {
text-align: center;
width: auto;
height: 30px;
margin: -3px 0 3px 0;
background: #1AC5CD;
-webkit-border-bottom-right-radius:5px;
-webkit-border-bottom-left-radius:5px;
-moz-border-radius-bottomright:5px;
-moz-border-radius-bottomleft:5px;
border-bottom-right-radius:5px;
border-bottom-left-radius:5px;
background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(0, 0, 0, 1)), to(rgba(0, 0, 0, 0)), color-stop(20%, rgba(0, 0, 0, 0.4)), color-stop(30%, rgba(0, 0, 0, 0.2)));
background-image: -moz-linear-gradient(-90deg, rgba(0, 0, 0, 1), rgba(0, 0, 0, 0.4) 20%, rgba(0, 0, 0, 0.2) 30%, rgba(0, 0, 0, 0));
}
.menu, .menu ul {
list-style: none;
}
.menu {
position: relative;
width: auto;
padding: 0 10px;
height: 30px;
background: #1AC5CD;
z-index: 10;
display: inline-block;
-webkit-border-bottom-right-radius:5px;
-webkit-border-bottom-left-radius:5px;
-moz-border-radius-bottomright:5px;
-moz-border-radius-bottomleft:5px;
border-bottom-right-radius:5px;
border-bottom-left-radius:5px;
background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(0, 0, 0, 1)), to(rgba(0, 0, 0, 0)), color-stop(20%, rgba(0, 0, 0, 0.4)), color-stop(30%, rgba(0, 0, 0, 0.2)));
background-image: -moz-linear-gradient(-90deg, rgba(0, 0, 0, 1), rgba(0, 0, 0, 0.4) 20%, rgba(0, 0, 0, 0.2) 30%, rgba(0, 0, 0, 0));
}
.menu li {
float: left;
}
.menu li a {
clear: both;
float: left;
display: block;
font: normal 12px/30px verdana, sans-serif;
color: #D69A4A;
text-decoration: none;
padding: 0 10px;
text-shadow: 0 0 8px #000000, 0 0 8px #000000, 0 0 8px #000000, 0 0 4px #000000;
}
* html .menu li a:hover {
background: #891111;
color: #FFFFFF;
}
.menu li a:hover,
.menu li:hover > a {
background: #006666;
color: #1AC5CD;
text-shadow: 0 0 8px #000000, 0 0 8px #000000, 0 0 8px #000000, 0 0 4px #000000;
text-decoration: none;
background-image: -webkit-gradient(linear, left top, left bottom, from(rgba(255, 255, 255, 1)), to(rgba(255, 255, 255, 0)), color-stop(20%, rgba(255, 255, 255, 0.4)), color-stop(30%, rgba(255, 255, 255, 0.2)));
background-image: -moz-linear-gradient(-90deg, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0.4) 20%, rgba(255, 255, 255, 0.2) 30%, rgba(255, 255, 255, 0));
-webkit-border-top-right-radius:5px;
-webkit-border-top-left-radius:5px;
-moz-border-radius-topright:5px;
-moz-border-radius-topleft:5px;
border-top-right-radius:5px;
border-top-left-radius:5px;
}
.menu table {
border-collapse: collapse;
padding: 0;
margin: 0 0 -1px 0;
border: 0;
}
.menu div.holder {
max-width: 720px;
opacity: 0.92;
alpha(opacity=92);
filter: progid:DXImageTransform.Microsoft.Alpha(opacity=92);
height: 0;
top: 30px;
position: absolute;
overflow: hidden;
-webkit-transition: height 0.8s linear;
}
.menu div.slide {
background: #006666;
max-width: 670px;
padding: 0 15px 15px;
border: 1px solid #555555;
position: relative;
top: -300px;
-webkit-border-bottom-right-radius:5px;
-webkit-border-bottom-left-radius:5px;
-moz-border-radius-bottomright:5px;
-moz-border-radius-bottomleft:5px;
border-bottom-right-radius:5px;
border-bottom-left-radius:5px;
-moz-box-shadow: 0px 3px 10px rgba(0, 0, 0, 0.6);
-webkit-box-shadow: 0px 3px 10px rgba(0, 0, 0, 0.6);
box-shadow: 0px 3px 10px rgba(0, 0, 0, 0.6);
background-image: -webkit-gradient(linear, left bottom, left top, from(rgba(0, 0, 0, 1)), to(rgba(50, 0, 0, 0)), color-stop(10%, rgba(0, 0, 0, 0.4)), color-stop(20%, rgba(50, 0, 0, 0.2)));
background-image: -moz-linear-gradient(90deg, rgba(0, 0, 0, 1), rgba(0, 0, 0, 0.4) 10%, rgba(50, 0, 0, 0.2) 20%, rgba(50, 0, 0, 0));
-webkit-transition: top 0.8s linear;
}
.menu div.slide dl {
float: left;
width: 200px;
}
.menu :hover div.p1 {
height: 275px;
}
.menu :hover div.p2 {
height: 127px;
}
.menu :hover div.p3 {
height: 136px;
}
.menu :hover div.p4 {
height: 228px;
}
.menu :hover div.slide {
top: 0px;
}
.menu li .slide dl {
padding: 0;
margin: 0;
}
.menu li .slide dl dt {
float: left;
font-family: verdana, sans-serif;
font-size: 13px;
font-weight: bold;
text-decoration: underline;
padding: 10px 0 0;
margin: 0;
height: 18px;
line-height: 18px;
color: #1AC5CD;
}
.menu li .slide dl dd {
padding: 0;
margin: 0;
}
.menu li .slide dl dd a {
background: transparent;
height: 18px;
line-height: 18px;
}
* html .menu li .slide dl dd a:hover {
background: transparent;
}
#info .clear {
clear: left;
}
#info img {
display: block;
margin: 0 auto;
}
<div class="nav_menu">
<ul class="menu">
<!-- IF not S_IS_BOT -->
<li><a href="{U_LOGIN_LOGOUT}" title="{L_LOGIN_LOGOUT}">{L_LOGIN_LOGOUT}</a></li>
<!-- IF not S_USER_LOGGED_IN and S_REGISTER_ENABLED and not (S_SHOW_COPPA or S_REGISTRATION) -->
<li><a href="{U_REGISTER}"><strong>{L_REGISTER}</strong></a></li>
<!-- ENDIF -->
<!-- ENDIF -->
<!-- IF not S_IS_BOT and S_USER_LOGGED_IN -->
<!-- IF S_DISPLAY_PM -->
<li><a href="{U_PRIVATEMSGS}">{PRIVATE_MESSAGE_INFO}</a></li>
<!-- ENDIF -->
<li><a href="#">{L_PROFILE}<!--[if gte IE 7]><!--></a><!--<![endif]-->
<!--[if lte IE 6]><table><tr><td><![endif]-->
<div class="holder p1">
<div class="slide">
<dl>
<dt>{L_USERS}</dt>
<dd><a href="{U_PROFILE}">{L_PROFILE}</a></dd>
<!-- IF U_MCP -->
<dt>{L_MODERATORS}</dt>
<dd><a href="{U_MCP}">{L_MCP}</a></dd>
<!-- IF U_MCP_FORUM -->
<dd><a href="{U_MCP_FORUM}">{L_MODERATE_FORUM}</a></dd>
<!-- ENDIF -->
<!-- IF U_MCP_TOPIC -->
<dd><a href="{U_MCP_TOPIC}">{L_MODERATE_TOPIC}</a></dd>
<!-- ENDIF -->
<!-- IF U_MCP_POST -->
<dd><a href="{U_MCP_POST}">{L_MODERATE_POST}</a></dd>
<!-- ENDIF -->
<!-- ENDIF -->
<!-- IF U_ACP -->
<dt>{L_ADMINISTRATORS}</dt>
<dd><a href="{U_ACP}">{L_ACP}</a></dd>
<!-- ENDIF -->
<!-- IF U_STK -->
<dt>{L_STK}</dt>
<dd><a href="{U_STK}" title="{L_STK}">{L_STK}</a></dd>
<!-- ENDIF -->
</dl>
<br class="clear" />
</div>
</div>
<!--[if lte IE 6]></td></tr></table></a><![endif]-->
</li>
<!-- IF U_RESTORE_PERMISSIONS -->
<li><a href="{U_RESTORE_PERMISSIONS}">{L_RESTORE_PERMISSIONS}</a></li>
<!-- ENDIF -->
<!-- ENDIF -->
<li><a href="#">{L_FORUM}<!--[if gte IE 7]><!--></a><!--<![endif]-->
<!--[if lte IE 6]><table><tr><td><![endif]-->
<div class="holder p1">
<div class="slide">
<dl>
<dt>{L_INFORMATION}</dt>
<dd><a href="{U_FAQ}" title="{L_FAQ_EXPLAIN}">{L_FAQ}</a></dd>
<!-- IF S_DISPLAY_MEMBERLIST -->
<dd><a href="{U_MEMBERLIST}" title="{L_MEMBERLIST_EXPLAIN}">{L_MEMBERLIST}</a></dd>
<!-- ENDIF -->
<!-- IF not S_IS_BOT and U_MARK_FORUMS or U_MARK_TOPICS -->
<!-- IF not S_IS_BOT and U_MARK_FORUMS -->
<dd><a href="{U_MARK_FORUMS}">{L_MARK_FORUMS_READ}</a></dd>
<!-- ENDIF -->
<!-- IF not S_IS_BOT and U_MARK_TOPICS -->
<dd><a href="{U_MARK_TOPICS}">{L_MARK_TOPICS_READ}</a></dd>
<!-- ENDIF -->
<!-- ENDIF -->
</dl>
<br class="clear" />
</div>
</div>
<!--[if lte IE 6]></td></tr></table></a><![endif]-->
</li>
<!-- IF S_DISPLAY_SEARCH -->
<li><a href="#">{L_SEARCH}<!--[if gte IE 7]><!--></a><!--<![endif]-->
<!--[if lte IE 6]><table><tr><td><![endif]-->
<div class="holder p1">
<div class="slide">
<dl>
<dt>{L_SEARCH_FOR}</dt>
<!-- IF S_USER_LOGGED_IN --><dd><a href="{U_SEARCH_NEW}">{L_SEARCH_NEW}</a></dd><!-- ENDIF -->
<!-- IF S_LOAD_UNREADS --><dd><a href="{U_SEARCH_UNREAD}">{L_SEARCH_UNREAD}</a></dd><!-- ENDIF -->
<!-- IF S_USER_LOGGED_IN --><dd><a href="{U_SEARCH_SELF}">{L_SEARCH_SELF}</a></dd><!-- ENDIF -->
<dd><a href="{U_SEARCH_ACTIVE_TOPICS}">{L_SEARCH_ACTIVE_TOPICS}</a></dd>
<dd><a href="{U_SEARCH_UNANSWERED}">{L_SEARCH_UNANSWERED}</a></dd>
<!-- IF not S_IN_SEARCH -->
<dt>{L_SEARCH_ADV}</dt>
<dd><a href="{U_SEARCH}" title="{L_SEARCH_ADV_EXPLAIN}">{L_SEARCH_ADV}</a></dd>
<!-- ENDIF -->
</dl>
<br class="clear" />
</div>
</div>
<!--[if lte IE 6]></td></tr></table></a><![endif]-->
</li>
<!-- ENDIF -->
<!-- IF S_DONATE_ENABLED -->
<li><a href="{U_DONATE}" title="{L_DONATE_EXPLAIN}">{L_DONATE}</a></li>
<!-- IF S_DONATE_LIST_ENABLED -->
<li><a href="{U_DONATE_LIST}" title="{L_DONORS_EXPLAIN}">{L_DONORS}</a></li>
<!-- ENDIF -->
<!-- ENDIF -->
<li><a href="{U_DOWNLOADCENTRE}" title="{L_DOWNLOADCENTRE}">{L_DOWNLOADCENTRE}</a></li>
<li><a href="{U_TRACKER}" title="{L_TRACKER}">{L_TRACKER}</a></li>
<li><a href="{U_LINKS}" title="{L_LINKS_PAGE}">{L_LINKS}</a></li>
<!-- IF TOTAL_MODERATOR_REPORTS --><li><a href="{U_MODERATOR_REPORTS}">{TOTAL_MODERATOR_REPORTS}</a></li><!-- ENDIF -->
<!-- IF TOTAL_MODERATOR_POSTS --><li><a href="{U_MODERATOR_APPROVE_POSTS}">{TOTAL_MODERATOR_POSTS}</a></li><!-- ENDIF -->
<!-- IF TOTAL_MODERATOR_TOPICS --><li><a href="{U_MODERATOR_APPROVE_TOPICS}">{TOTAL_MODERATOR_TOPICS}</a></li><!-- ENDIF -->
<!-- IF TOTAL_MODERATOR_PMS --><li><a href="{U_MODERATOR_PMS}">{TOTAL_MODERATOR_PMS}</a></li><!-- ENDIF -->
</ul>
</div>