function checkKey(e) {
	var keyPressed = (document.all) ? event.keyCode : e.keyCode;
	if (keyPressed == 13) {
		submitForm();
		return false;
	}
}

function submitForm() {
	if (document.all && window.external) window.external.AutoCompleteSaveForm(form1);
	document.form1.submit();
}

if (document.layers)                 { document.captureEvents(Event.KEYDOWN); }
if (document.layers || document.all) { document.onkeydown = checkKey; }
if (document.addEventListener)       { document.addEventListener('keydown', checkKey, true); }