Creating JSON string from associated array. JavaScript

I have problems to covert an associated array in JavaScript to JSON object. The problem is as follow: I have an Array which index are Strings and when I use JSON.stringify(myArray) it returns []. If I build my Array as an Object the problem is solved and return {"key1":"value1","key2":"value2"} but the conversi开发者_运维技巧on is different. I want a conversion with my Array object like ["key1":"value1","key2":"value2"]. It also works fine when my index are numbers but no when are Strings.

How I can do that? I've search the forum for an answer and I found a lot of info but not something like that.

PD: I will let you an example

var prueba = new Array();
prueba["key1"] = "value1";
prueba["key2"] = "value2";

This dont work when I stringify it.

var prueba = new Object();
prueba["key1"] = "value1";
prueba["key2"] = "value2";

This works fine but the result is not apropiated to deserialize it in other languages (trust me).

var prueba = new Array();
prueba[0] = "value1";
prueba[1] = "value2";

This works exactly I want but with numeric index.

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Why not

var input = '{"key1":"value1","key2":"value2"}',
    output = input.replace(/^{(.*)}$/, '[$1]');

console.log(output); // >> ["key1":"value1","key2":"value2"]

Here input is the result of an ordinary JSON.stringify(), output is the RegExp'ed input.