<script>
var cookieString = String(document.cookie)
var cookieHeader = 'happy_pop=' //更换happy_pop为任意名称
var beginPosition = cookieString.indexOf(cookieHeader)
(beginPosition <0){
window.open('2.html','','top=0,left=0,width=787,height=480,toolbar=yes,menubar=yes,scrollbars=yes,resizable=yes,location=yes,status=yes');
var Then = Date　　　　
Then.Time(Then.getTime + 60*1000 ) //同ip设置过期时间即多长间隔跳出次
document.cookie = 'happy_pop=yes;expires='+ Then.toGMTString　 //更换happy_pop和第4行样名称
}
</script>