可关闭，可最小化，带点淡入淡出效果的右下角弹出广告；
参考如下：
<html><head>
<title>右下角广告代码</title>
<style type="text/css">
#msg_win{border:1px solid #A67901background:#EAEAEAwidth:300pxposition:absoluteright:2margin:0pxdisplay:noneoverflow:hiddenz-index:99}
#msg_win .icos{position:absolutetop:2px*top:0pxright:2pxz-index:9}
.icos a{float:leftcolor:#833B02margin:1pxtext-align:centertext-decoration:nonefont-family:webdings}
.icos a:hover{color:#fff}
#msg_title{background:#FECD00border-bottom:1px solid #A67901border-top:1px solid #FFFborder-left:1px solid #FFFcolor:#000height:25pxline-height:25pxtext-indent:5px}
#msg_content{margin:2pxwidth:300pxheight:200pxoverflow:hidden}
</style>
</head>
<body>
<p style="height:1000px"></p>
<div id="msg_win" style="display:blocktop:490pxvisibility:visibleopacity:1">
<div class="icos"><a id="msg_min" title="最小化" href="javascript:void 0">_</a><a id="msg_close" title="关闭" href="javascript:void 0">×</a></div>
<div id="msg_title">广而告之：</div>
<div id="msg_content"><a href="http://www.baidu.com/" target="_blank"><img src="http://www.codefans.net/ad_include/zhubajie300_270.gif" width="300" height="270" border="0"></a></div>
</div>
</body>
</html>
<script language="javascript">
var Message={
set: function() {//最小化与恢复状态切换
var set=this.minbtn.status == 1?[0,1,'block',this.char[0],'最小化']:[1,0,'none',this.char[1],'恢复']
this.minbtn.status=set[0]
this.win.style.borderBottomWidth=set[1]
this.content.style.display =set[2]
this.minbtn.innerHTML =set[3]
this.minbtn.title = set[4]
this.win.style.top = this.getY().top
},
close: function() {//关闭
this.win.style.display = 'none'
window.onscroll = null
},
setOpacity: function(x) {//设置透明度
var v = x >= 100 ? '': 'Alpha(opacity=' + x + ')'
this.win.style.visibility = x<=0?'hidden':'visible'//IE有绝对或相对定位内容不随父透明度变化的bug
this.win.style.filter = v
this.win.style.opacity = x / 100
},
show: function() {//渐显
clearInterval(this.timer2)
var me = this,fx = this.fx(0, 100, 0.1),t = 0
this.timer2 = setInterval(function() {
t = fx()
me.setOpacity(t[0])
if (t[1] == 0) {clearInterval(me.timer2) }
},10)
},
fx: function(a, b, c) {//缓冲计算
var cMath = Math[(a - b) > 0 ? "floor": "ceil"],c = c || 0.1
return function() {return [a += cMath((b - a) * c), a - b]}
},
getY: function() {//计算移动坐标
var d = document,b = document.body, e = document.documentElement
var s = Math.max(b.scrollTop, e.scrollTop)
var h = /BackCompat/i.test(document.compatMode)?b.clientHeight:e.clientHeight
var h2 = this.win.offsetHeight
return {foot: s + h + h2 + 2+'px',top: s + h - h2 - 2+'px'}
},
moveTo: function(y) {//移动动画
clearInterval(this.timer)
var me = this,a = parseInt(this.win.style.top)||0
var fx = this.fx(a, parseInt(y))
var t = 0
this.timer = setInterval(function() {
t = fx()
me.win.style.top = t[0]+'px'
if (t[1] == 0) {
clearInterval(me.timer)
me.bind()
}
},10)
},
bind:function (){//绑定窗口滚动条与大小变化事件
var me=this,st,rt
window.onscroll = function() {
clearTimeout(st)
clearTimeout(me.timer2)
me.setOpacity(0)
st = setTimeout(function() {
me.win.style.top = me.getY().top
me.show()
},600)
}
window.onresize = function (){
clearTimeout(rt)
rt = setTimeout(function() {me.win.style.top = me.getY().top},100)
}
},
init: function() {//创建HTML
function $(id) {return document.getElementById(id)}
this.win=$('msg_win')
var set={minbtn: 'msg_min',closebtn: 'msg_close',title: 'msg_title',content: 'msg_content'}
for (var Id in set) {this[Id] = $(set[Id])}
var me = this
this.minbtn.onclick = function() {me.set()this.blur()}
this.closebtn.onclick = function() {me.close()}
this.char=navigator.userAgent.toLowerCase().indexOf('firefox')+1?['_','::','×']:['0','2','r']//FF不支持webdings字体
this.minbtn.innerHTML=this.char[0]
this.closebtn.innerHTML=this.char[2]
setTimeout(function() {//初始化最先位置
me.win.style.display = 'block'
me.win.style.top = me.getY().foot
me.moveTo(me.getY().top)
},0)
return this
}
}
Message.init()
</script>
