function validatelogin(){

	var error = "";
	if($('login').value == "" && $('pwd').value == "")
		error = LOGIN_BOTH;
	else if($('login').value == "")
		error = LOGIN_LOGIN;
	else if($('pwd').value == "")
		error = LOGIN_PWD;
		
	if(error != "")	{
		alert(error);
		return false;
	}
	$('login-form').submit();
}