How to assign mutiple keys via the value of variables for an javascript object literal
<p>I wonder if it's possible to have an object like a multidimensional array?
What I want is something like:</p>

<pre><code>lines[first][first first]= "value key key"        


    lines          =       {};
    key            =       "first";
    key_key        =       "first first";
    lines[key]     =       "value key ";
    lines[key][key_key]=   "value key key "

    console.log(lines);
</code></pre>

<p>Output:
can't convert undefined to object</p>
