Get screen width Javascript

<script type="text/javascript" language="javascript">

    if (document.getElementById("rightMenu") != null) {

        if (screen.width < 1200) {

            document.getElementById("rightMenu").style.display = "none";

        }

    }

</script>

position fixed for IE6

Add this code in the header

<!--[if IE 6]>
<style type="text/css">
.promomenu{
position:absolute; /* position fixed for IE6 */
top:expression(200+((e=document.documentElement.scrollTop)?e:document.body.scrollTop)+'px');
right:expression(0+((e=document.documentElement.scrollLeft)?e:document.body.scrollLeft)+'px');
}
</style>
<![endif]-->