function enter(element, value) {
	if (element.value == value) element.value = '';
	element.focus();
	return true;
}

function leave(element, value) {
	if (element.value == '') element.value = value;
	return true;
}

function switchInputs(from, to) {
	var n = from.name;
	from.name = to.name;
	to.name = n;
	from.style.display = 'none';
	to.style.display = 'inline';
}

function enterPwd(element, pwdId, value) {
	var pwd = document.getElementById(pwdId);
	switchInputs(element, pwd);
	pwd.focus();
	return true;
}

function leavePwd(element, dummyId) {
	var dummy = document.getElementById(dummyId);
	if (element.value == '') switchInputs(element, dummy);
	return true;
}