Master / Child pages

I have a master page and numerous child pages derived from that page.  I have a button on the child page.  When I click the button, I want to call a Javascript function that exists in the master page.  I need to pass 2 parms to the function, an integer and a string.

I want the Javascript function in the master page because I do not want to copy and past it to all my child pages.

How can I do this?
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You can call it without a problem

Just put a condition to make sure it exists

if(typeof functionname == 'function')
HLRosenbergerAuthor Commented:
Wonderful.    I did not realize I could do this...  So, once the master and child are combined into one page, any Javacript function is within scope of any other Javacript function ?


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HLRosenbergerAuthor Commented:
Why opener.functionName()?  verses just calling the function as a result of onClick?
HLRosenbergerAuthor Commented:
It won't work without using 'opener'.
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