Ok. Das war etwas schwer zu verstehen.
Ist das ein Ansatz:
<!DOCTYPE html>
<html>
<head>
<title>toggle</title>
<style type="text/css">
div#dasIsses div.derWrapper {
height:0px;
overflow:hidden;
transition:height 2s;
-moz-transition:height 2s; /* Firefox 4 */
-webkit-transition:height 2s; /* Safari and Chrome */
-o-transition:height 2s; /* Opera */
}
div#dasIsses:hover div.derWrapper {
height:11.5em;
}
</style>
</head>
<body>
<div style="position:absolute;top:0;height:200px;left:100px;width:600px;background-color:#0000ff;z-index:99"> </div>
<div id="dasIsses" style="position:absolute; top:200px; left:100px; width:600px;background-color:#ddf; border:1 px solid black">
<div class="derWrapper">
<div style="position:absolute; bottom:1.3em;overflow:hidden">
Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.
</div>
</div>
<div style="font-weight:bold">
Lari Fari Fidebus!
</div>
</div>
</body>
</html>
Muss natürlich noch verfeinert werden...