Form variables

According to the docs, when creating form variables which will be passed as globals to the next PHP script invocation, one can make single dimensional arrays, but not multi-dimensional arrays. I read this after I'd created a script which generates a form with a 2D array on it. But as I test it, it seems to work. Now, I'm perfectly happy that it works, but should I be concerned about how it works? Is this something which may only work in Navigator and nothing else? In short, it the 1D array a limitation of HTML or PHP? If it's a risky structure to use, I'll find a way to work it into a single dimensional array... Thanks! -Michael -- No, my friend, the way to have good and safe government, is not to trust it all to one, but to divide it among the many, distributing to every one exactly the functions he is competent to. It is by dividing and subdividing these republics from the national one down through all its subordinations, until it ends in the administration of every man's farm by himself; by placing under every one what his own eye may superintend, that all will be done for the best. -- Thomas Jefferson, to Joseph Cabell, 1816