Using variables as variables

[Frank]

Hey Everyone,

Lets say I have a variable declared as such:

var newVariable="opener";

How can I then use this variable to access the opener of 'window' ?

Meaning, I dont want to access it as such:

window.opener

but as: window.+newVariable

So it uses the contents of newVariable to access the opener.

I need this because I have a couple of variables which I need to
concat to eachother as a string,
and this string in turn is the variable I need to access from
window.opener.varSomething
where varSomething is the variable that stores the variable I need to
access.

Hope I am clear enough,
Regards Frank

 

[Martin Honnen]

Lets say I have a variable declared as such:

var newVariable="opener";

How can I then use this variable to access the opener of 'window' ?

Meaning, I dont want to access it as such:

window.opener

but as: window.+newVariable

Use the bracket notation object[expression] e.g.
window[newVariable]

 

[Lee]

Frank said:

Meaning, I dont want to access it as such:

window.opener

but as: window.+newVariable

window[newVariable]

In addition to the "dot" notation (and other methods) attributes
of objects are also available via "square bracket" notation, as
if the object were an array indexed by string attribute names.


--

 

[Frank]

Frank said:

Meaning, I dont want to access it as such:

but as: window.+newVariable

window[newVariable]

In addition to the "dot" notation (and other methods) attributes
of objects are also available via "square bracket" notation, as
if the object were an array indexed by string attribute names.

--

Thanks everyone, I did not know you can also access it using the
square bracket notation.
Regards,
Frank

 

[Dr J R Stockton]

In comp.lang.javascript message <[email protected]

Thanks everyone, I did not know you can also access it using the
square bracket notation.

Which proves that previous responses ought to have advised you to read
the newsgroup FAQ. See below.