Code that pops up ad special effects (one IP only pops up once)

<script>
var cookieString = new String()
var cookieHeader = 'happy_pop='//Replace happy_pop with any name
var beginPosition = (cookieHeader)
if (beginPosition <0){
('','','top=0,left=0,width=787,height=480,toolbar=yes,menubar=yes,scrollbars=yes,resizable=yes,location=yes,status=yes');
var Then = new Date()
(() + 60*1000 ) //The expiration time of the same ip, that is, how long does it take to jump out once
= 'happy_pop=yes;expires='+ () //Replace the same name as happy_pop as line 4
}
</script>