Subj : Re: JavaScript problem
To   : netscape.public.mozilla.jseng
From : Brendan Eich <brendan@meer.net>
Date : Sat Oct 11 2003 10:48 am

Martin Honnen wrote:

> Well, it is "working" in Mozilla too, only with a different result. 
> Change your code to
> 
> var o = new function() {
>     var This = this;
> 
>     this.f = function() {
>         alert( This.f.caller );
>     }
> }
> 
> function g() {
>     o.f.call(this);
> }
> g.p = "hello";
> 
> g();
> 
> and you will see what the caller function is, in Mozilla's case it is 
> the function
>   call
> in IE's case it is the function
>   g
> so that is why you get a different result (when reading the p property).
> The caller property is nowhere defined in the ECMAScript edition 3, 
> indeed there are implementation like Opera 7's ECMAScript implementation 
> which do not implement caller at all.
> It is therefore not possible to decide which implementation is right as 
> the spec doesn't tell.
> 
> With Mozilla you need to access
>   This.f.caller.caller
> if you are looking for the function g.
> 

Or don't invoke f using call, just call o.f(this) inside g.

/be

.