始终保持浮动在右侧边栏上下居中的广告特效-JS特效-爱易网页

始终保持浮动在右侧边栏上下居中的广告特效

日期：2014-05-18　浏览次数：20208 次

以下是程序代码

<!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=utf-8" />
<title>侧边栏广告</title>
<style type="text/css">
#div_1 { width:100px; height:80px; background:#0f0; position:fixed; _position:absolute; right:0px; top:0px;}
</style>
<script type="text/javascript">
window.onscroll = window.onresize = window.onload = function(){
 
 var odiv = document.getElementById("div_1");
 var sTop = document.documentElement.scrollTop || document.body.scrollTop;
 var cHeight= document.documentElement.clientHeight || document.body.clientHeight;
 var mid = (cHeight - odiv.offsetHeight) / 2; 
 // odiv.style.top = parseInt(sTop + mid) + "px";   //理论上应该只设这句就可以居中吧
 
 //实际上的 各大浏览器只认识下面这if判断
 if(navigator.appVersion.indexOf("MSIE 6")> -1){
  odiv.style.top = parseInt(sTop + mid) + "px";
 }else{
  odiv.style.top =mid + "px";
 }
}
</script>
</head>

[Ctrl+A 全部选择提示：你可先修改部分代码，再按运行]