如何在网页两边显示随滚动条滚动的广告

<!-- ********广告和弹出窗口代码******** -->
<SCRIPT language=javascript>
function closecfadw1()
function closecfadw2()
var specialcode="<DIV id=cfadw1 style='Z-INDEX: 100; right: 1px; POSITION: absolute; TOP: 30px;'><TABLE cellSpacing=0 cellPadding=0 width=102 style='font-size:12px;color:#ffffff'><TR bgcolor=#C54A00><TD height=20> 推荐↓</TD><TD style='CURSOR: hand' onclick='closecfadw1()' width=30>关 闭</TD></TR></TABLE><iframe WIDTH=102 HEIGHT=232 align=center MARGINWIDTH=0 Name=hscfw MARGINHEIGHT=0 HSPACE=0 VSPACE=0 FRAMEBORDER=0 SCROLLING=no src=http://></iframe></DIV>";
document.write(specialcode);
lastScrollX=0;
window.setInterval("cfsclw1()",1);

var specialcode2="<DIV id=cfadw2 style='Z-INDEX: 100; left: 1px; POSITION: absolute; TOP: 30px;'><TABLE cellSpacing=0 cellPadding=0 width=102 style='font-size:12px;color:#ffffff'><TR bgcolor=#12BDFF><TD height=20> 推荐↓</TD><TD style='CURSOR: hand' onclick='closecfadw2()' width=30>关 闭</TD></TR></TABLE><iframe WIDTH=102 HEIGHT=232 align=center MARGINWIDTH=0 Name=hscfw MARGINHEIGHT=0 HSPACE=0 VSPACE=0 FRAMEBORDER=0 SCROLLING=no src=http://></iframe></DIV>";
document.write(specialcode2);
lastScrollY=0;
</SCRIPT>