Heyy php'ers

Ik heb een website met een dropdown menu:

http://www.plaatjesupload.nl/bekijk/2008/11/29/1227956961-190.jpg

en ik krijg van sommige mensen een melding dat die niet werkt. Hij kan ik dit oplossen??

dropdown :

<ul id="nav" class="dropdown dropdown-horizontal">
	<li class="navigation"><a href="index.php">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Index&nbsp;&nbsp;&nbsp;&nbsp;</a></li>
	<li class="navigation"><a href="">Criminalitijd&nbsp;</a></li>
		<ul>
			<li class="navigation"><a href="crime.php">&nbsp;&nbsp;&nbsp;Misdaad&nbsp;&nbsp;&nbsp;&nbsp;</a></li>
			<li class="navigation"><a href="work.php">&nbsp;&nbsp;&nbsp;&nbsp;Werken&nbsp;&nbsp;&nbsp;&nbsp;</a></li>
            <li class="navigation"><a href="drugs.php?drugs=kopen">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Drugs&nbsp;&nbsp&nbsp;&nbsp;&nbsp;&nbsp;</a></li>    
        </ul>
	<li class="navigation"><a href="./">&nbsp;&nbsp;&nbsp;Locaties&nbsp;&nbsp;&nbsp;</a>
				<ul>
					<li class="navigation"><a href="bank.php">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Bank&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</a></li>
					<li class="navigation"><a href="shop.php">&nbsp;&nbsp;&nbsp;&nbsp;Winkel&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</a></li>
					<li class="navigation"><a href="hospital.php">&nbsp;&nbsp;Ziekenhuis&nbsp;</a>
				    <li class="navigation"><a href="callcredit_shop.php">Credit Shop</a></li>
				    <li class="navigation"><a href="">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Casino&nbsp;&nbsp;&nbsp;&nbsp;</a></li>
				       <ul>
				          <li class="navigation"><a href="casino_raadhetgetal.php">Raad.het.getal</a></li>
				          <li class="navigation"><a href="casino_hogerlager.php">Hoger.lager</a></li>
				       </ul>
				    </li>
			    </ul>

			</li>
    <li class="navigation"><a href="./">&nbsp;&nbsp; &nbsp;
&nbsp; Overig &nbsp; &nbsp;&nbsp; &nbsp;
</a>
				<ul>
					<li class="navigation"><a href="memberlist.php">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ledenlijst&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</a></li>
					<li class="navigation"><a href="online.php">&nbsp;&nbsp;Online leden&nbsp;&nbsp;&nbsp;</a></li>
					<li class="navigation"><a href="story.php">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Verhaal&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</a></li>
					<li class="navigation"><a href="profile.php?act=edit_profile">&nbsp;&nbsp;Wijzig profiel&nbsp;</a></li>
					<li class="navigation"><a href="myprofile.php">&nbsp;&nbsp;&nbsp;Mijn Profiel&nbsp;&nbsp;&nbsp;</a></li>
					<li class="navigation"><a href="forum/index.php">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Forum&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</a></li>
				</ul>
			</li>
			<li class="navigation"><a href="logoff.php">&nbsp;&nbsp;&nbsp;Uitloggen&nbsp;&nbsp;&nbsp</a></li>
			<?
			if($row['admin'] === "1")
			{?>
			<li class="navigation"><a href="index.php">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Admin&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</a></li>	
			<ul>
				<li class="navigation"><a href="admin_nieuws.php">&nbsp;Add nieuws&nbsp;</a></li>	
			</ul>
			 <? } ?>
		</ul>
	</li>


style.css

/*
Template name: Natural Essence
Template URI: http://templates.arcsin.se/natural-essence-website-template/
Release date: 2007-02-20
Description: Soft and natural single/two-column template.
Author: Viktor Persson
Author URI: http://arcsin.se/

This template is licensed under a Creative Commons Attribution 2.5 License:
http://templates.arcsin.se/license/
*/


/* default elements */
* {margin: 0; padding: 0;}

body {
	background: #7C6F5C url(img/bg.jpg);
	color: #222;
	font: normal 62.5% sans-serif;
	padding: 2% 0;
}

a {color: #642;}
a:hover {color: #963;}

big {font-size: 1.1em;}

h1,h2,h3 {color: #442; padding: 8px 0 2px;}

h1 {font: normal 2.4em serif,sans-serif;}
h1 a {text-decoration: none;}
h1 a:hover {text-decoration: underline;}

h2 {font: normal 1.6em serif,sans-serif;}
h3 {font: bold 1.2em serif,sans-serif;}

blockquote {
	background: url('img/quote.gif') no-repeat;
	display: block;
	font: normal 1.1em Georgia,serif;
	padding-left: 26px
}

form,table {margin-bottom: 1.2em;}
img {border: none;}
label {display: block;}
li {line-height: 1.5em;}
p {padding: 2px 0 10px;}
small,.small {font: normal 0.9em sans-serif;}
ul {padding: 0 2em 1.2em;}

/* structure */
#wrapper {
	background: #332 url(img/wrapper.gif) no-repeat left bottom;
	margin: 0 auto;
	width: 762px;
}
#container {
	background: #FBF9F4;
	border-top: 6px solid #332;
	font-size: 1.3em;
	line-height: 1.3em;
	margin: 0 auto;
	width: 750px;
}

/* header */
.title {
	background: #E2DED4;
	border-top: 1px solid #996;
}
.title h1 {
	color: #441;
	font: normal 2.2em Georgia,"Trebuchet MS",sans-serif;
	padding: 10px 0 10px 18px;
}

.header {
	border-top: 2px solid #663;
	background: #DAD7C5 url(img/header.jpg) no-repeat left bottom;
	height: 220px;
}

/* navigation */
.navigation {
	background: #DED9D0 url(img/nav.gif) repeat-x; height: 41px;
	border-top: 1px solid #996;
}
.navigation a {
	background: #FFF url(img/nav.gif) no-repeat;
	border-right: 1px solid #C9C6B3;
	color: #553;
	float: left;
	font: bold 1em Tahoma,sans-serif;
	padding: 0 14px;
	line-height: 41px;
	text-align: center;
	text-decoration: none;
}
.navigation a:hover,.navigation a#active {background-position: left bottom; color: #331;}

/* main */
.main#two-columns {background: #FFF url(img/two-columns.gif) repeat-y;}

/* bottom */
.bottom {
	background: #DCDAC9 url(img/bottom.gif) no-repeat left bottom;
	border-top: 1px solid #AA8;
	color: #444;
	padding: 14px 20px;
}
.bottom .left,.bottom .right {width: 49%;}

/* footer */
.footer {
	background: #332;
	color: #EED;
	padding: 10px;
}
.footer .left {width: 66%;}
.footer .right {
	width: 33%;
	text-align: right;
}
.footer a {
	color: #FFF;
	text-decoration: none;
}
.footer a:hover, .footer .right a:hover {
	color: #FFF;
	text-decoration: underline;
}
.footer .right, .footer .right a {color: #7D7D75;}

/* gallery */
.gallery td {
	vertical-align: top;
	text-align: center;
}
.gallery em {display: block;}

/* misc */
.clear,.clearer {clear: both;} 
.clearer {font-size: 0;}
.col2 .left {width: 64%;}
.col2 .right .content {background: #FFF;}
.col2 .right {width: 33%;}
.content {padding: 18px 20px;}
.left {float: left;}
.right {float: right;}
.right .content {padding: 18px 12px 12px;}

/* block list */
ul.block {
	border-top: 1px dashed #BCBAAC;
	margin: 4px 0;
	padding: 0;
	width: 90%;
}
.block li {
	border-bottom: 1px dashed #BCBAAC;
	list-style: none;
}
.block li a,.block li em {
	color: #553;
	display: block;
}
.block li em {
	font-size: 0.9em;
	font-style: normal;
}
.block li a {
	padding: 4px 3%;
	text-decoration: none;
	width: 94%;
}
.block li a span {font-weight: bold;}
.block li a:hover {
	background: #D2D0C0;
	color: #553;
}

.right .block,.right .block li {border-color: #DCDACC;}
.right .block li a:hover {background: #F2F0EA;}
ul, li {margin: 0; padding: 0;}


dropdown.css

@charset "UTF-8";

/**
 * Horizontal CSS Drop-Down Menu Module
 *
 * @file		dropdown.css
 * @package		Dropdown
 * @version		0.7.1
 * @type		Transitional
 * @stacks		597-599
 * @browsers	Windows: IE6+, Opera7+, Firefox1+
 *				Mac OS: Safari2+, Firefox2+
 *
 * @link		http://www.lwis.net/
 * @copyright	2006-2008 Live Web Institute. All Rights Reserved.
 *
 */

ul.dropdown,
ul.dropdown li,
ul.dropdown ul {
 list-style: none;
 margin: 0;
 padding: 0;
}

ul.dropdown {
 position: relative;
 z-index: 597;
 float: left;
}

ul.dropdown li {
 float: left;
 line-height: 1.3em;
 vertical-align: middle;
 zoom: 1;
}

ul.dropdown li.hover,
ul.dropdown li:hover {
 position: relative;
 z-index: 599;
 cursor: default;
}

ul.dropdown ul {
 visibility: hidden;
 position: absolute;
 top: 100%;
 left: 0;
 z-index: 598;
 width: 100%;
}

ul.dropdown ul li {
 float: none;
}

ul.dropdown ul ul {
 top: 1px;
 left: 99%;
}

ul.dropdown li:hover > ul {
 visibility: visible;
}

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