how do I delay pop-up window?

I am using this code to launch a pop-up window when a page loads. I need to delay it by about 5 seconds.

Can anyone tell me how to do that?

<script>

function openpopup(){
var popurl=”http://www.xx.com/xxmailweb/xxSetup?oid=153&save=1&email_address=#email_address#”
winpops=window.open(popurl,””,”width=600,height=600,”)
}

openpopup()
</script>

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