How can I return a global variabl..help plz.

Hello Everyone,

I would highly appreciate it if someone can help me understand how I can send a value to global variable. Here is the scenario:

Lets say I have an AS file which starts something like this:

Line 1:
_global.popId = null;

onLine 3000 of code, I would like to pass a value from a function to popId:

function id(p)
{
popId = p;
return p;
}

I am calling the function here:

id(234);

Appreciate all the help.

Thanks a lot.