Shelane,
>Is there a test to know if a function has been defined or declared?
>
>function modify(){
> ...my code
>}
>
>if(function('modify'))
>
>
>or something like that?
A function is just a variable.
if( !!modify ) alert("exists");
if( typeof modify == "function" ) alert("exists and is a function");
These are just a few methods of testing.
-Dan
