acces bidimensional array data form from JavaScript

Hi there!!! I want to access a bidimensional array in a form from javaScript, but I do not know how to do that. this is the form

[code]

<td><input type=”text” name=”tn[‘.$elem[‘id’].’][]” value=”‘.$elem[‘name’].'” /> </td>

[/code]

As you can see, it is PHP code that generates several input form. What I want to get is the array “tn” in JavaScript, because I need to check that the text is not empty

thanks a lot!

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