$(function () {
  
  var msie6 = $.browser == 'msie' && $.browser.version < 7;
  
  if (!msie6) {
    //var top_services = $('#services_block_right').offset().top - parseFloat($('#header_menu_container').css('height')) - parseFloat($('#services_block_right').css('margin-top').replace(/auto/, 0));
    var top_menu = $('#header_menu_container').offset().top - parseFloat($('#header_menu_container').css('margin-top').replace(/auto/, 0));
    
    $(window).scroll(function (event) {
    	
      var y = $(this).scrollTop();
      /*
      if (y >= top_services) $('#services_block_right').addClass('fixed');
      else $('#services_block_right').removeClass('fixed');
      */
      if (y >= top_menu) $('#header_menu_container').addClass('fixed');
      else $('#header_menu_container').removeClass('fixed');
      
      
    });
   
    
  }  
});