[Javascript] variable whose name is the result of a calculation?

[javascript@xxxxxxxxxx (Anthony Webster)]

hi all,

I want to define a new variable, whose name is the result of a =
calculation.

does this make sense? a simple example follows

var1 =3D 'ora';
var2=3D 'nge';
var3 =3D var1 + var2;
// result:
// var3 =3D 'orange';
eval(var3) =3D '263';
// intended result:
// orange =3D '#FB8E36';

of course when I do this, javascript is not happy. it doesnt like the =
left hand side with the 'intended result' bit.

why am I doing things like this? I am going to be supplied the names of =
the colours without knowing what they will be. I will need to evaluate =
what they are and then declare variables for each of them so I can reuse =
this information.

any help would be greatly appreciated!

thanks,

anthony