document.onkeypress = enterKeyHandler;

function enterKeyHandler(eventOrSource) {
	eventSource = (window.event) ?	window.event.srcElement : eventOrSource.target;

	if(eventSource.type == "textarea")
	return;

	key = (window.event) ?	window.event.keyCode : eventOrSource.keyCode;

	if(key == 13) {
		return false;
	}
}