var g_loginWindow = null;

function login()
{
  new Ajax.Request( 'login2.php', {
    parameters: $('loginfrm').serialize(),
    method: 'post',
    onSuccess: function( transport ) {
       g_loginWindow.close();
    }
  } );
}

function showWindow()
{
  g_loginWindow = new Window( { className: 'spread',  title: "Выберите регион", width:300,
    height:80,
    destroyOnClose: true,
    onClose:function() { $('myloginform').style.display = 'none'; } } ); 
  g_loginWindow.setContent( 'myloginform', false, true );
  g_loginWindow.showCenter();
}