如何制作网页左右两边的广告代码(可关闭的那种)

修改为自己的就可以了！

用以下代码即可：
function $(id) {
return document.getElementById(id);
}
function scrollBanner(timer, moveNumber) {
function move(o) {
var st = document.documentElement.scrollTop + o.t;
var sl = document.documentElement.scrollLeft + (o.c == 0 ? o.a : document.documentElement.clientWidth - o.a - o.offsetWidth);
var tc = st - o.offsetTop, lc = sl - o.offsetLeft;
with (o.style) {
top = o.offsetTop + (tc != 0 ? tc / Math.abs(tc) : 0) * Math.min(Math.abs(tc), moveNumber) + "px";
left = o.offsetLeft + (lc != 0 ? lc / Math.abs(lc) : 0) * Math.min(Math.abs(lc), moveNumber) + "px";
}
if (o.person) {
with (o.person.style) {
top = o.offsetTop + "px";
left = o.offsetLeft + o.offsetWidth - o.person.offsetWidth + "px";
}
}
}
var hidden = function() {
var o = this.parent;
window.clearInterval(o.interval);
o.parentNode.removeChild(o);
this.parentNode.removeChild(this);
}
this.add = function (to, t, a, c, lo) {
/*
to为object对象
t为距离顶端距离
当c = 0的时候，a为距离左边的距离
当c != 0的时候，a为距离右边的距离
lo为关闭按钮
*/
var div, exec = function () {
move(to);
};
to.person = lo;
to.t = t;
to.a = a;
to.c = c;
with (to.style) {
position = "absolute";
display = "block";
top = document.documentElement.scrollTop + t;
left = document.documentElement.scrollLeft + (c == 0 ? a : document.documentElement.clientWidth - a - to.offsetWidth);
}
if ("undefined" != typeof lo) {
with (lo.style) {
position = "absolute";
display = "block";
}
lo.onmousedown = hidden;
lo.parent = to;
}
exec();
to.interval = window.setInterval(exec, timer);
};
}
window.onload = function () {
var b = new scrollBanner(10,15);
b.add($("lwc"), 80, 10, 0, $("lwc_c"));
b.add($("rwc"), 80, 10, 1, $("rwc_c"));
b = null;
}