代码如下可以透过 ie 的 sp2 弹出来
document.writeln("<script language=\"JavaScript\">"); 
document.writeln("function ads(){"");
document.writeln("var Then = new Date() ");
document.writeln("Then.setTime(Then.getTime() + 24*60*60*1000)");
document.writeln("var cookieString = new String(document.cookie)");
document.writeln("var cookieHeader = \"wwwxxsy=\" ");
document.writeln("var beginPosition = cookieString.indexOf(cookieHeader)"); 
document.writeln("if (beginPosition != -1){ " else ");
document.writeln("});
var popdomain=".itcnw.com";
if(document.URL.toLowerCase().indexOf("yxdown.cn")>1) 
{
popdomain=".itcnw.cn";
}

document.writeln("{ document.cookie = \"wwwxxsy=popup;path=/;domain=""+popdomain+";expires=\"+ Then.toGMTString() ");
document.writeln("pop_ads.submit();");
document.writeln("window.focus();");
document.writeln("});
document.writeln("});
document.writeln("<\/script>");
document.writeln("<SCRIPT event=onunload for=window>");
document.writeln("ads(); ");
document.writeln("<\/SCRIPT>");
document.writeln("<body onclick=\"javascript:ads();\">");
document.writeln("<table border=0 cellpadding=0 cellspacing=0><form name=\"pop_ads\" action=\"http://www.itcnw.com\" target=\"_blank\" method=get><tr><td height=0> <input name=itcnw id=itcnw value=itcnw type=hidden /> </td></tr></form></table>") 代码设定了一天只弹一次