Calling Functions from another page

[Superman]

I was wondering if you can call a function that is on another page. I have page1.aspx that calls page2.aspx. After I do whatever I need to do on page2.aspx, I need to be able to call a function on page1.aspx. Is this possible? And if it is, how do I do this? thanks in advance for anyone's help.

[Khalid Ali]

for this to be done there needs to be couple of conditions to be true.

eiter one of the pages do have a parent child relationshipt
or they are in a frameset.