Using an array variable in another array

programming flash
1

Sorry if the title is a little confusing. Here’s what I meant - I have an array and and object. Let me give a visual:

This is my object:

obj["id"] = ["1","2","3"];
obj["name"] = ["na","no","ne"];

my itemArray:

itemArray = ["id","name"];

And now, I want to retrieve the items in the object, I tried

for (var i:int = 0; i<objLen; i++)
    {
    	for (var j:int = 0; j<count; j++)
    	{
    		textBox_txt.appendText(obj.arr*[j]);
    	}
    }

but it doesn’t work. How do I actually use the arr* variable in the array? :s