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AND my code is
margin-left: 94px;
margin-top: -66px;
margin-left: 94px;
margin-top: -66px;
max-width: 100%;"/></a></h1>
<nav>
<ul class="menu">
<li><a href="index.php">home</a></li>
<li><a href="about_us.php">about as</a></li>
<li><a href="product.php">product</a></li>
<li><a href="<?php session_start(); if(isset($_SESSION['login_user'])){ echo "client_tree.php"; }else{ echo "clients.php"; } ?>"> clients </a></li>
<li><a class="active" href="contacts.php">contacts</a></li>
<?php
if(isset($_SESSION['login_user'])){
echo "<li>";
echo "<a href='logout.php'>";
echo "Logout";
echo "</a>";
echo "</li>";
}
?>
</ul>
</nav>
<div class="clear"></div>
</div>
<div style="margin: -9% 0 1% 86%;
position: absolute;">
<a href="#"><?php if(isset($_SESSION['login_user'])){
echo "Wel come:";
echo $_SESSION['login_user'];
} ?></a>
</div>
<div class="slider-wrapper">
<div class="slider">
<div class="banner">
<strong> <strong></strong></strong>
<em></em>
</div>
</div>
</div>
</header>
max-width: 100%;"/></a></h1>
<nav>
<ul class="menu">
<li><a href="index.php">home</a></li>
<li><a href="about_us.php">about as</a></li>
<li><a href="product.php">product</a></li>
<li><a href="<?php session_start(); if(isset($_SESSION['login_user'])){ echo "client_tree.php"; }else{ echo "clients.php"; } ?>"> clients </a></li>
<li><a class="active" href="contacts.php">contacts</a></li>
<?php
if(isset($_SESSION['login_user'])){
echo "<li>";
echo "<a href='logout.php'>";
echo "Logout";
echo "</a>";
echo "</li>";
}
?>
</ul>
</nav>
<div class="clear"></div>
</div>
<div style="margin: -9% 0 1% 86%;
position: absolute;">
<a href="#"><?php if(isset($_SESSION['login_user'])){
echo "Wel come:";
echo $_SESSION['login_user'];
} ?></a>
</div>
<div class="slider-wrapper">
<div class="slider">
<div class="banner">
<strong> <strong></strong></strong>
<em></em>
</div>
</div>
</div>
</header>