How do I declare and use dynamic variables in JavaScript?

Question

Suppose I need to declare a JavaScript variable based on a counter, how do I do so?

var pageNumber = 1; var "text"+pageNumber; 

The above code does not work.

Answer 1

In JavaScript (as i know) there are 2 ways by which you can create dynamic variables:

1. eval Function
2. window object

eval:

var pageNumber = 1; eval("var text" + pageNumber + "=123;"); alert(text1); 

window object:

var pageNumber = 1; window["text" + pageNumber] = 123; alert(window["text" + pageNumber]); 

Answer 2

How would you then access said variable since you don't know its name? :) You're probably better off setting a parameter on an object, e.g.:

var obj = {}; obj['text' + pageNumber] = 1; 

if you -really- want to do this:

eval('var text' + pageNumber + '=1');