右侧广告浮动代码。

"< DIV id=floater1 style="Z-INDEX: 100; LEFT: 10px; VISIBILITY: visible; WIDTH: 100px; POSITION: absolute; TOP: 160px; height: 100px;" >
左边的东西,可以是图片,表格
< /DIV >

< DIV id=floater style="Z-INDEX: 100; RIGHT: 10px; VISIBILITY: visible; WIDTH: 100px; POSITION: absolute; TOP: 160px; left: 890px;" >
右边的东西,可以是图片,表格
< /DIV >"

把下列代码存成文件包含到网页中就行了
menus.js的代码如下:
self.onError = null;
currentX = currentY = 0;
whichIt = null;
lastScrollX = 0; lastScrollY = 0;
NS = (document.layers) ? 1 : 0;
IE = (document.all) ? 1: 0;
function heartBeat(objectid) {
if(IE) { diffY = document.body.scrollTop; diffX = document.body.scrollLeft; }
if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; }
if(diffY != lastScrollY) {
percent = .1 * (diffY - lastScrollY);
if(percent > 0) percent = Math.ceil(percent); <