<Ret> from text input

I have a php script that I'm writing for taking/passing/reading phone messages. I've got a screen where one enters the name of the person leaving the message. I've found that when the "from_whom" field is active, if the user hits Return, the form is returned w/o hitting a "submit" button. Is this defined behavior, or is it Netscape-specific? Is there a way to turn that off? -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