[Lynne]

As suggested, just put <vb:literal> tags around your javascript:

<vb:literal>
        <script language="Javascript" type="text/javascript">
            function CybChFRAll(obj) {
                var arrInput = document.getElementsByTagName("input");
                for (i=0; i<arrInput.length; i++) {
                    if (arrInput[i].type == 'checkbox') {
                        arrInput[i].checked = obj.checked;
                    }
                }
            }
            function Cyb_SwitchCFRMNG(target)
            {
                if (target=="rules")
                {
                    document.getElementById("cfrules_mngrules").style.display = "block";
                    document.getElementById("cfrules_mngforums").style.display = "none";
                }
                if (target=="forums")
                {
                    document.getElementById("cfrules_mngrules").style.display = "none";
                    document.getElementById("cfrules_mngforums").style.display = "block";
                }
            }
        </script>
</vb:literal>