Først og fremmest laver du en elementær fejl med ulovlig nesting, for du kan ikke med andre elementer omkranse et tr-element, et sådant må _kun_ omkranses af et table(/tbody)-element, og må ligeledes alene indeholde td-elementer, men da det jo alligevel er tr-elementet, du skal vise/skjule kan du ligesågodt tage direkte fat i det:
<html>
<head>
<meta http-equiv="Content-Language" content="da">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>Start</title>
<link rel="stylesheet" href="style.css" type="text/css" />
<script type="text/javascript" src="tree.js"></script>
<script language="javascript">
<!--
var Open = ""
var Closed = ""
function preload(){
if(document.images){
Open = new Image(16,13)
Closed = new Image(16,13)
Open.src = "img/folderopen.gif"
Closed.src = "img/folder.gif"
}}
function showhide(what,what2){
what = document.getElementById(what);
what2 = document.getElementById(what2);
if (what.style.display=='none'){
what.style.display='';
what2.src=Open.src
}else{
what.style.display='none'
what2.src=Closed.src
}
}
-->
</script>
</head>
<body bgcolor="#D5D6D5" onload="preload()">
<div class="ForsideTabel">
<div class="menu">
<table border="0" cellpadding="0" cellspacing="0" id="table1">
<tr>
<td><img border="0" src="img/base.gif" width="19" height="18"></td>
<td colspan="3"><b>Navigation</b></td>
</tr>
<tr id="menu1" onClick="showhide('menu1outline','menu1sign')" style="cursor:pointer;">
<td><img border="0" src="img/join.gif" width="18" height="18"></td>
<td><img id="menu1sign" src="img/folder.gif" valign="bottom"></td>
<td colspan="2"><b>Menu</b></td>
</tr>
<tr id="menu1outline" style="display:none;">
<td><img border="0" src="img/line.gif" width="18" height="18"></td>
<td><img border="0" src="img/join.gif" width="18" height="18"></td>
<td><img border="0" src="img/page.gif" width="18" height="18"></td>
<td>Text</td>
</tr>
<tr>
<td><img border="0" src="img/line.gif" width="18" height="18"></td>
<td><img border="0" src="img/joinbottom.gif" width="18" height="18"></td>
<td><img border="0" src="img/page.gif" width="18" height="18"></td>
<td>Text</td>
</tr>
</table>
</div>
</div>
</body>
</html>
-- desuden rettede jeg koden, så den ikke alene virker i ie, men i samtlige nutidige browsere ...
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