从新浪弄下来的全屏广告代码 与使用说明

<!--全屏开始--><!--interstitial begin-->
      <script language=javascript> 
<!--
//时间计算
syfullscreen=false;
today=new date();
function testdate()
{
    if(today.getmonth()=='2') //是否为3月
        {
            if(today.getdate()=='15') //是否为15日
            {
<!--725a3e8355cb-->//全屏开始
if(today.gethours()>='14' && today.gethours()<'15')
{    
    adinterpath='http://ad4.sina.com.cn/sina/ae/ad_src/fullscreen/fullscreenv2.html?
http://sina.allyes.com/main/adfclick?
db=sina&bid=73474,105318,105433&cid=0,0,0&sid=97875&advid=3716&camid=14291&show=ignore&url=http://61.49.38.5/tzhddoc/index.ht
m${}/upload/2007315152115702.jpg';syfullscreen=true                                

}<!--$$ huiyan/2007-3-15 14:00:01 ~ 2007-3-15 14:59:59/b $-->
<!--4774607c08fd-->//全屏开始
if(today.gethours()>='8' && today.gethours()<'9')
{    
    adinterpath='http://ad4.sina.com.cn/sina/ae/ad_src/fullscreen/fullscreenv2.html?
http://sina.allyes.com/main/adfclick?
db=sina&bid=73474,105318,105433&cid=0,0,0&sid=97875&advid=3716&camid=14291&show=ignore&url=http://61.49.38.5/tzhddoc/index.ht
m${}/upload/2007315152115903.jpg';syfullscreen=true                            

}<!--$$ raowei/2007-3-15 ~ 2007-3-16 两天勿撤，谢谢！/b $-->
<!--35f6b37fb5e4-->//全屏开始
if(today.gethours()>='16' && today.gethours()<'17')
{    
    adinterpath='http://ad4.sina.com.cn/sina/ae/ad_src/fullscreen/fullscreenv2.html?
http://sina.allyes.com/main/adfclick?
db=sina&bid=70483,101960,102064&cid=0,0,0&sid=94712&advid=3254&camid=13506&show=ignore&url=http://www.sagitar.com.cn/${}
/upload/2007315152115985.gif';syfullscreen=true                    

}<!--$$ limeng/2007-3-15 16:00:01 ~ 2007-3-15 16:59:59/b $-->
<!--c5eb1d51e54c-->//全屏开始
if(today.gethours()>='17' && today.gethours()<'18')
{    
    adinterpath='http://ad4.sina.com.cn/sina/ae/ad_src/fullscreen/fullscreenv2.html?
http://sina.allyes.com/main/adfclick?
db=sina&bid=73214,104975,105088&cid=0,0,0&sid=97562&advid=3705&camid=14237&show=ignore&url=http://adclient.dentsu.com.cn/html
.ng/adspec=flash&adtype=single_dui_lian&affiliate=sina&campaignid=842&channel=aoyun_page&log=0&para;ms.styles=clickcmd?${}
/upload/2007315152115273.jpg';syfullscreen=true                    

}<!--$$ limeng/2007-3-15 17:00:01 ~ 2007-3-15 17:59:59/b $-->
<!--d4c112442caf-->//全屏开始
if(today.gethours()>='18' && today.gethours()<'19')
{    
    adinterpath='http://ad4.sina.com.cn/sina/ae/ad_src/fullscreen/fullscreenv2.html?
http://sina.allyes.com/main/adfclick?
db=sina&bid=73271,105059,105175&cid=0,0,0&sid=97643&advid=3254&camid=14234&show=ignore&url=http://www.sagitar.com.cn/olympic$
{}/upload/2007315152115162.jpg';syfullscreen=true                

}<!--$$ limeng/2007-3-15 ~ 2007-3-15/b $-->
}}}
testdate();
var msie=navigator.useragent.indexof("msie");
var oper=navigator.useragent.indexof("opera");
if(syfullscreen==true)
{
    if (document.all && msie!=-1 && oper==-1) { 
    // this is a 4.x browser, no? 
function changediv(){
    document.getelementbyid('hiddenlayer').style.display = "block";
    document.getelementbyid('interstitialframe').src = adinterpath;
    settimeout("hidediv()",5000)
}
function hidediv(){
    document.getelementbyid('hiddenlayer').style.display="none";
    sytag=2;
}
function showfull(){
    settimeout("changediv()",2000); 
}
showfull();
    }
}
// -->
</script>
      <script language=javascript> 
<!--
if(syfullscreen==true)
{
    if (document.all && msie!=-1 && oper==-1) { 
    // this is a 4.x browser, no? 
        document.write('<div id="hiddenlayer" style="display: none; height: 450px;">');

        expandableiframe = '<iframe id="interstitialframe" width=750 height=450 noresize scrolling=no frameborder=0 
marginheight=0 marginwidth=0></iframe>';
        document.write(expandableiframe);

}
document.write('</div>');
}
// -->
</script>
<!--interstitial end--><!--全屏结束-->
说明新浪主要是根据时间段来显示不同的广告,然后将动态控制iframe来显示广告
有个重要的文件

的代码如下,用${}作为分割符,利用了数组

ary[0]为连接地址
ary[1]为图片地址