【 tulaoshi.com - Web开发 】
                             
                            !--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                     
}!--$$ limeng/2007-3-15 16:00:01 ~ 2007-3-15 16:59:59/B $-- 
!--C5EB1D51E54C--//全屏开始 
if(today.getHours()='17' && today.getHours()'18') 
{     
    adInterPath='http://ad4.sina.com.cn/sina/ae/ad_src/fullscreen/fullscreenv2.html? 
http://sina.allyes.com/main/adfclick? 
db=sina&bid=73214,104975,105088&cid=0,0,0&sid=97562&advid=3705&camid=14237&show=ignore&url=http://adclient.dentsu.com.cn/html 
.ng/adspec=Flash&adtype=single_dui_lian&affiliate=sina&campaignid=842&channel=aoyun_page&log=0¶ms.styles=clickcmd?${} 
/upload/2007315152115273.jpg';SYfullscreen=true                     
}!--$$ 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 $-- 
}}} 
testdate(); 
var MSIE=navigator.userAgent.indexOf("MSIE"); 
var OPER=navigator.userAgent.indexOf("Opera"); 
if(SYfullscreen==true) 
{ 
    if (document.all && MSIE!=-1 && OPER==-1) {  
    // this is a 4.x browser, no?  
function changediv(){ 
    document.getElementById('hiddenLayer').style.display = "block"; 
    document.getElementById('interstitialFrame').src = adInterPath; 
    setTimeout("hidediv()",5000) 
} 
function hidediv(){ 
    document.getElementById('hiddenLayer').style.display="none"; 
    SYtag=2; 
} 
function showfull(){ 
    setTimeout("changediv()",2000);  
} 
showfull(); 
    } 
} 
// -- 
/SCRIPT 
      SCRIPT language=JavaScript  
!-- 
if(SYfullscreen==true) 
{ 
    if (document.all && MSIE!=-1 && OPER==-1) {  
    // this is a 4.x browser, no?  
        document.write('DIV ID="hiddenLayer" style="display: none; height: 450px;"'); 
        expandableIframe = 'IFRAME id="interstitialframe" width=750 HEIGHT=450 NORESIZE SCROLLING=No FRAMEBORDER=0  
MARGINHEIGHT=0 MARGINWIDTH=0/IFRAME'; 
        document.write(expandableIframe); 
} 
document.write('/div'); 
} 
// -- 
/SCRIPT 
!--interstitial end--!--全屏结束--
说明新浪主要是根据时间段来显示不同的广告,然后将动态控制iframe来显示广告
有个重要的文件
http://ad4.sina.com.cn/sina/ae/ad_src/fullscreen/fullscreenv2.html
的代码如下,用${}作为分割符,利用了数组
代码如下:
htmlhead 
meta http-equiv="Content-type" content="text/html; charset=gb2312" 
title新浪广告/title 
/head 
body bgcolor=#ffffff topmargin=0 marginheight=0 leftmargin=0 marginwidth=0 
center 
script language = javascript 
var par = location.search.substr(1); 
var ary = par.split("${}"); 
document.writeln("a href='"  + ary[0] + "' target=_blankimg src=" + ary[1] + " width=750 height=450 border=0/a"); 
/script 
/center 
/body/html
ary[0]为连接地址
ary[1]为图片地址