How do I convert this String to a variable?

programming flash
1

First I’m defining the location of my external SWFs to be loaded like this:

var sec1:String = “projects.swf”;
var sec2:String = “news.swf”;

and so on…

then on my button functions I tried:

var loadSection = [“sec”+linkClicked];
container.loadMovie(loadSection);

(each button has it’s own id called linkClicked)
but Flash is trying to load a movie called “sec1”, not the variable sec1.

Thanks!