function checkEnter(e) {
	var characterCode;

	if(e && e.which) {
		e = e;
		characterCode = e.which;
	} else {
		e = event;
		characterCode = e.keyCode;
	}

	if(characterCode == 13) {
		document.forms[0].submit();
		return false;
	} else {
		return true;
	}
}