On Firefox every thing looks fine to me.
The javascript errors are due to the news ticket script on the site:
<script type="text/javascript">
var tickerwidth = 500;
var tickercolor = "#60676F";
var fontcolor = "#ffffff";
var splitcolor = "#ffffff";
var fontsize = 9;
var visitedlink = "#ffffff";
var rollovercolor = "#ffffff";
var font = "Verdana";
var speed = 2;
var sparte = 4;
var rubrik = 3;
var rollover_underline = 1;
var font_underline = 0;
var transparent = 1;
var fontbold = 0;
var tickertyp = 1;
var u_id = 355932;
</script>
<script type="text/javascript" src="http://newsticker.shortnews.de/de/js/free/3/a.js"></script>
That script uses the $ variable to store data which overrides the one provided by prototype. We can't do anything about this.