Mam dotaz, jakto že mi tenhle script ve FireFoxu nefunguje, ale v IE to běhá v pohodě...
<script language="JavaScript" type="text/javascript">
<!--
document.styleSheets[0].addRule(".dve-barvy","height:25px; float: left; width:" + (screen.width)/3.8 + ";");
// -->
</script>