dom = (document.getElementById)? true : false;
isOpera = (window.opera)? true : false;
isOpera7 = (isOpera && document.readyState)? true : false;

function hideLogin() {
	document.getElementById('login-form').style.display = "none";
        document.getElementById('login-form-shadow').style.display = 'none';
	return false;
}

function viseLogin() {
	document.getElementById('login-form').style.display = "block";
        document.getElementById('login-form-shadow').style.display = 'block';
	return false;
}