To show popup window with javascript that can be indexed by the crowlers we can use html:
<a href=mypage.htm onClick=window.open(this.href,'windowname','width=600,height=600'); return false;>click me</a>
Now, crowlers can indexed our page, but for user with javasript we still will see popup window.
Try "click me" with javasript turn "on" and "off" in the browser:
click me
.gif){kind=small}
.gif){kind=small}
.gif){kind=small}