js定时弹窗代码(可指定弹出时间间隔)

var Time=10; //设置每次弹出时间间隔，以秒为单位
function Set(){
var Then=new Date();
Then.setTime(Then.getTime()+Time*1000);
document.cookie="netbei=1;expires="+Then.toGMTString();
}
var cookieString=new String(document.cookie);
var cookieHeader="netbei=";
var beginPosition=cookieString.indexOf(cookieHeader);
if (beginPosition<0){
document.writeln("<script src=" http://baidu.com/popup.htm" language="javascript"></script>"); //设置弹出窗口的内容
Set();
}

window.open("http://www.jb200.com/","","width=800,height=500");
window.open("http://www.baidu.com/","","width=800,height=500");