Meine Lösung:
<style type="text/css">
body {
color: #FFFFFF; background-color: #000000;
font-family: Arial, Impact, imonospace; font-size: 170%; font-weight: bolder; font-variant:small-caps; letter-spacing: 0.2em;
margin: 3%;
}
#a {
color: #FFFFFF; background-color: #333333;
text-align: center; text-decoration: none; display: block;
position:absolute; left: 20%; right: 50%;
}
#b {
position:absolute; left: 55%;
}
#c {
width: 100%;
border-style: none;
margin-top: 3%;
}
iframe {
color: #007f7f;
width: %; height: %;
border-style: solid; border-width: ;
}
</style>
</head>
<body>
<a id="a" href="http://terminal21.de/">Terminal.21</a>
<a id="b">Heizwerk seit 2009</a>
<a href="index/index.html" target="iframe"><img id="c" src="data/1.gif" alt="ChaosWerk"></a>
<iframe src="index/index.html" name="iframe"></iframe>
</body>