兼容性非常好的js右下角与漂浮广告代码

兼容ie6 7 8 ,ff3.5 3.6,chrome 4.1.2,safari
重新修正
1.滚动时抖动的问题，主要体现在ff3.6上
2.加入了ie6下的固定
3.分成了两个块，xhtml,html解析
4.随着屏幕大小而变动

兼容ie6 7 8
ff3.5 3.6
chrome 4.1.2
safari

xhtml1.0解析

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gbk" /> 
<title>Untitled Document</title> 
<style> 
html,body{ 
padding:0; 
margin:0; 
} 
</style> 
</head> 
<body> 
<div id="aa" style="width:100px;height:100px;background:#c0c0c0;" >我在随平滚</div> 
<div id="bb" style="width:100px;height:100px;background:#c0c0c0;" >我静止不动</div> 
<div style="width:100%;height:1500px;background:#000"></div> 
<div style="width:100%;height:1500px;background:green"></div> 
<div style="width:100%;height:1500px;background:red"></div> 
</body> 
</html> 
<script> 
function scrollx(p){ 
var d = document,dd = d.documentElement,db = d.body,w = window,o = d.getElementById(p.id),ie6 = /msie 6/i.test(navigator.userAgent),style,timer; 
if(o){ 
o.style.cssText +=";position:"+(p.f&&!ie6?'fixed':'absolute')+";"+(p.l==undefined?'right:0;':'left:'+p.l+'px;')+(p.t!=undefined?'top:'+p.t+'px':'bottom:0'); 
if(p.f&&ie6){ 
o.style.cssText +=';left:expression(documentElement.scrollLeft + '+(p.l==undefined?dd.clientWidth-o.offsetWidth:p.l)+' + "px");top:expression(documentElement.scrollTop +'+(p.t==undefined?dd.clientHeight-o.offsetHeight:p.t)+'+ "px" );'; 
dd.style.cssText +=';background-image: url(about:blank);background-attachment:fixed;'; 
}else{ 
if(!p.f){ 
w.onresize = w.onscroll = function(){ 
clearInterval(timer); 
timer = setInterval(function(){ 
//双选择为了修复chrome 下xhtml解析时dd.scrollTop为 0 
var st = (dd.scrollTop||db.scrollTop),c; 
c = st - o.offsetTop + (p.t!=undefined?p.t:(w.innerHeight||dd.clientHeight)-o.offsetHeight); 
if(c!=0){ 
o.style.top = o.offsetTop + Math.ceil(Math.abs(c)/10)*(c<0?-1:1) + 'px'; 
}else{ 
clearInterval(timer); 
} 
},10)

}

} 
} 
} 
} 
scrollx({ 
id:'aa'

}) 
scrollx({ 
id:'bb', 
l:0, 
t:200, 
f:1 
}) 
/* 
id 你要滚动的内容的id 
l 横坐标的位置 不写为紧贴右边 
t 你要放在页面的那个位置默认是贴着底边 0是贴着顶边 
f 1表示固定 不写或者0表示滚动 
*/ 
</script>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

html4.01解析

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gbk" /> 
<title>Untitled Document</title> 
<style> 
html,body{ 
padding:0; 
margin:0; 
} 
</style> 
</head> 
<body> 
<div id="aa" style="width:100px;height:100px;background:#c0c0c0;" >我在随平滚</div> 
<div id="bb" style="width:100px;height:100px;background:#c0c0c0;" >我静止不动</div> 
<div style="width:100%;height:1500px;background:#000"></div> 
<div style="width:100%;height:1500px;background:green"></div> 
<div style="width:100%;height:1500px;background:red"></div> 
</body> 
</html> 
<script> 
function scroll(p){ 
var d = document,dd = d.documentElement,db = d.body,w = window,o = d.getElementById(p.id),ie = /msie/i.test(navigator.userAgent),style,timer; 
if(o){ 
//ie8下position:fixed下top left失效 
o.style.cssText +=";position:"+(p.f&&!ie?'fixed':'absolute')+";"+(p.l==undefined?'right:0;':'left:'+p.l+'px;')+(p.t!=undefined?'top:'+p.t+'px':'bottom:0'); 
if(p.f&&ie){ 
o.style.cssText +=';left:expression(body.scrollLeft + '+(p.l==undefined?db.clientWidth-o.offsetWidth:p.l)+' + "px");top:expression(body.scrollTop +'+(p.t==undefined?db.clientHeight-o.offsetHeight:p.t)+'+ "px" );' 
db.style.cssText +=";background-image:url(about:blank);background-attachment:fixed;" 
}else{ 
if(!p.f){ 
w.onresize = w.onscroll = function(){ 
clearInterval(timer); 
timer = setInterval(function(){ 
var st = db.scrollTop,c; 
c = st - o.offsetTop + (p.t!=undefined?p.t:(w.innerHeight||db.clientHeight)-o.offsetHeight); 
if(c!=0){ 
o.style.top = o.offsetTop + Math.ceil(Math.abs(c)/10)*(c<0?-1:1) + 'px'; 
}else{ 
clearInterval(timer); 
} 
},10) 
} 
} 
} 
} 
} 
scroll({ 
id:'aa'

}) 
scroll({ 
id:'bb', 
l:0, 
t:200, 
f:1 
}) 
/* 
id 你要滚动的内容的id 
l 横坐标的位置 不写为紧贴右边 
t 你要放在页面的那个位置默认是贴着底边 0是贴着顶边 
f 1表示固定 不写或者0表示滚动 
*/ 
</script>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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