[jQuery] jQuery (1.2.6) $.ajax and IE7 problem

[Charlie22]

Hi all, I have probelm with these pages http://83.240.47.84/skyrace2
under FF3 menu rules and submenu works fine, but under IE7 it is
loosing data. What is wrong there?

scripts:

Menu:
$(function(){
        $("ul#menu li a:first").addClass('active');
   $("ul#menu li a").click(function(){
                $("ul#menu li a:only-child").removeClass('active');
                $(this).addClass('active');
                var href = $(this).attr('href');
                $('#obsah>*').remove();
                $.ajax({
                                        url: href,
                                        success: function(html){
                                                                
$('#obsah').append(html);
                                                                }
                                 });
                return false;
  });
});

Submneu:
$(function(){
                          $('#menu2 li a:first').addClass('active2');
                          $('#rkontys>*').css('display','none');
                          $('#rGeneral').css('display','');
                          $('#menu2 li a').click(function(){
                                         var href1=$(this).attr('href');
                                         //$('#obsah>*').remove();
                                         $('#menu2 li 
a:only-child').removeClass('active2');
                                         $(this).addClass('active2');
                                         $('#rkontys>*').css('display','none');
                                         $('#'+href1).css('display', '');
                                         if (href1=='complete'){
                                         $('#rkontys>*').css('display', '')};
                                         return false;
                                         });
                          });