Lot's of different ways:
1.You could pass a parameter in the url
var mypopup=window.open('page.asp?popup=true')
Then check for it in the popup using location.search
2.You could give your popup window a name
var mypopup=window.open('page.asp','popupName')
Then check for it using window.name
3.You could assign a value to a variable in the popup
var mypopup=window.open('page.asp','popupName')
mypopup.isPopup=true;
I'm sure there are a lot more ways.
Adam
while(ignorance){perpetuate(violence,fear,hatred);life=life-1};