Using eval on variables' names

Question

The line
eval("_root."+this.p).display_text.text=this.v
works fine, whereas
eval("_root."+this.n)=eval("_root."+this.n)+this.step;
says "Left side of assignment operator must be variable or
property"
p is a name of an object created with arrachMovie
n is the name of a variable containing a number
Using this[] in place of eval() raises no errors but does no
do the
assignment meant
What is the explaination?

Answer 1

In my case eval("_root."+this.n) is called on an object which
has an
attribute n which holds a string "variableName" and another
attribute called
step, holding a number
There is variable called variableName in the root, holding a
number
I expected eval("_root."+this.n) to evaluate to
_root.variableName and then
will add a number held in this.n to the number held in
variableName
Where are my expectations wrong?
"kglad" <[email protected]> wrote in message
news:e2g4ha$7t6$[email protected]..
> eval("_root."+this.n)+this.step supposed be be? it's a
string, so you're
not
> going to resolve it into an object by assigning it to
something that looks
like
> an object.
>
> if this is an object, then you could assign that to
this.
>