textboxes = $(".input, select, textarea");

if ($.browser.mozilla) {
	$(textboxes).keypress (checkForEnter);
} else {
	$(textboxes).keydown (checkForEnter);
}

function checkForEnter (event) {
	
	if (event.keyCode == 13) {
		currentBoxNumber = textboxes.index(this);
				
		if (textboxes[currentBoxNumber + 1] != null) {
			nextBox = textboxes[currentBoxNumber + 1]
			nextBox.focus();

			event.preventDefault();
			return false;
		}
	}
}