大幅广告显示隐藏效果【新浪新闻页面效果】[1]

news.sina.com.cn首页打开产生一张大幅广告效果页面  2000毫秒后消失效果

公司下载站需要这样的效果

制作完成 源码提供出来大家一起分享

首先制作   ad.js 文件

var ads_agt=navigator.useragent.tolowercase();
var ads_is_major = parseint(navigator.appversion);

var ads_is_ie   = ((ads_agt.indexof("msie") != -1) && (ads_agt.indexof("opera") == -1) && (ads_agt.indexof("omniweb") == -1));
var ads_is_ie3  = (ads_is_ie && (ads_is_major < 4));
var ads_is_ie4  = (ads_is_ie && (ads_is_major == 4) && (ads_agt.indexof("msie 5")==-1) && (ads_agt.indexof("msie 6")==-1));
var ads_is_ie4up  = (ads_is_ie  && (ads_is_major >= 4));
var ads_is_ie5  = (ads_is_ie && (ads_is_major == 4) && (ads_agt.indexof("msie 5.0")!=-1) );
var ads_is_ie5up  = (ads_is_ie  && !ads_is_ie3 && !ads_is_ie4);
var ads_is_ie5_1_macbeta = (ads_is_ie && (ads_agt.indexof("mac")!=-1) && (ads_agt.indexof("5.1b")!=-1));

var ads_is_nav  = ((ads_agt.indexof('mozilla')!=-1) && (ads_agt.indexof('spoofer')==-1)
   && (ads_agt.indexof('compatible') == -1) && (ads_agt.indexof('opera')==-1)
   && (ads_agt.indexof('webtv')==-1));
var ads_is_nav6 = (ads_is_nav && (ads_agt.indexof("netscape6")!=-1) && (ads_agt.indexof("6.1")==-1));
var ads_is_nav6up = (ads_is_nav && !ads_is_nav4 && !ads_is_nav3 && !ads_is_nav2);
var ads_is_nav6_1 = (ads_is_nav && (ads_agt.indexof("netscape6")!=-1) && (ads_agt.indexof("6.1")!=-1));
var ads_is_nav6_1up = (ads_is_nav && !ads_is_nav6 && !ads_is_nav4 && !ads_is_nav3 && !ads_is_nav2);

getsglu = ((ads_is_ie5up && !ads_is_ie5_1_macbeta) || ads_is_nav6_1up);

//function changediv(depth)
//{
// divall.style.zindex=depth
// }
function changediv()
{
document.getelementbyid('hiddenlayer').style.display = "block";
document.getelementbyid('interstitialframe').src = adinterpath;
settimeout("hidediv()",5000)   //5000为毫秒  是页面停留的时间间隔 你可以设定适当的数字

}
function hidediv()
{
document.getelementbyid('hiddenlayer').style.display="none";
sytag=2;
}
function showfull()
{
settimeout("changediv()",2000);

}
showfull()

然后在你想添加这样效果的页面适当的地方增加如下代码

<script language="javascript">
<!--
syfullscreen=true
var adinterpath="http://xu-ni.net/news/index.asp"   //这里显示的是你的广告页面  最好是单独的flash或者图片  你可以设定连接连接到别的页面上
if (document.all) {
// this is a 4.x browser, no?
document.write('<scri' + 'pt language="javascript1.2"');
document.writeln(' src="ad.js"></scr' + 'ipt>');
}
// -->
</script>
<div id="hiddenlayer" style="display: none; height: 450px;">
<script language="javascript">
<!--
if (getsglu) {
  expandableiframe = '<iframe id="interstitialframe" width=750 height=450 noresize scrolling=no frameborder=0 marginheight=0 marginwidth=0></iframe>';
  document.write(expandableiframe);    //宽度和高度不需要解释了吧
}
// -->
</script>