need help bei nen include :: webwork-community.net

also hab da einmal die "index.php"..und wollte dann dort die seite "welcome.php" includen, der text aus "welcome.php" erscheint auch. wenn ich aber eine andere seite verlinke, bleibt der text dort..hab kp warum..könnte mir vllt wer helfen?^^

da is meine index.php^^"

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<title>Dr Bressem :P</title>
<link rel="stylesheet" href="style.css">
<div id="layer2" style="width:525px; height:310px; position:absolute; left:230px; top:570px; z-index:1;">
<p class="header3">Content<p><br>



<?php 
	switch ($_GET['action']) {
case "home": include("welcome.php"); break; 
default: include("welcome.php");
} 
?>



<head>
<title>easyNews</title>
<style type="text/css">
 A:link    {color: 75716e; text-decoration: none; }
 A:active  {color: 75716e; text-decoration: none; }
 A:visited {color: 75716e; text-decoration: none; }
 A:hover   {color: #ffffff; text-decoration: underline; }
 BODY      {scrollbar-face-color: #FFFFFF; scrollbar-shadow-color: ; scrollbar-highlight-color: ;
     	    scrollbar-3dlight-color: ; scrollbar-darkshadow-color: ; scrollbar-track-color: #EEEEEE;
     	    scrollbar-arrow-color: #336699}
</style>
</head>
<body style="background-color:; color:#ffffff"><div align="center">
 <table width="98%" border="0" cellspacing="0" cellpadding="1" style="border:0px  solid">

 </table>
 <br />
</div>
</html></div>
<div id="layer2" style="width:175px; height:410px; position:absolute; left:595px; top:275px; z-index:1;">
<p><p class="header3">Main</p>
<table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="100%" id="AutoNumber1" align="left">
  <tr>
<a href="index.php">Home</a><br />
<a href="index.php?action=test">Test</a>
</td>
  </tr>
</table></div>

<div id="layer2" style="width:800; height:600; position:absolute; left0px; top:0; z-index:-1; left:0">
<img src="layout/header.jpg" width="1024" height="600">
</div>
<body background="layout/bg.jpg">