How to access javascript variable value by creating another variable via concatenation?

Question

Hi

Please have a look on the following code -

var abc_text = "Hello";
var def_text = "world";

function testMe(elem) {
    var xyz = elem+"_text";
    alert(xyz);
}

testMe("abc");
testMe("def");

I am trying to pass prefix to a function and the try to print some pre-defined values by concatenating. But the above example just prints "abc_text" and "def_text" .. instead of "Hello" and "world". How can I get it working?

Thank you.

EDIT

I am using Jquery.

Answer 1

in this case use

var xyz = window[elem+"_text"];

Answer 2

There is a pretty good write-up on Dynamic Variables in JavaScript here:

http://www.hiteshagrawal.com/javascript/dynamic-variables-in-javascript