FLASH® LITE™ 2.x - Adobe Help and Support

In Flash 4, you can also use eval() to dynamically set and retrieve the value of a variable or
instance name. However, you can also do this with the array access operator ([]).
In Flash 5 or later, you cannot use eval() to dynamically set and retrieve the value of a
variable or instance name, because you cannot useeval() on the left side of an equation. For
example, replace the code
eval ("var" + i) = "first";
with this:
this["var"+i] = "first"
or this:
set ("var" + i, "first");
Parameters
expression:Object - The name of a variable, property, object, or movie clip to retrieve. This
parameter can be either a String or a direct reference to the object instance (i.e use of
quotation marks (" ") is optional.)
Returns
Object - A value, reference to an object or movie clip, or undefined .
Example
The following example uses eval() to set properties for dynamically named movie clips. This
ActionScript sets the _rotation property for three movie clips, called square1_mc,
square2_mc, and square3_mc.
for (var i = 1; i