How to alert variable name, not a value

Question

Hi,

How to alert variable name, not a value of variable?

var color = 'red';

alert(color); // Will alert 'red'
alert(/* magic */); // Will alert 'color'

Answer 1

In the Firebug console:

>>> a=[]
[]
>>> a
[]
>>> b=a
[]
>>> a.push(3)
1
>>> b
[3]
>>> a
[3]

So, which variable name would you like that array to return? a? b? Something completely different?

Answer 2

It's not possible in JavaScript, because arguments in this language are passed by value or by reference, not by name, so when variable is passed to function, its name is lost.