//swap

$(document).ready(function(){
  var column_shell_container = $("#column_shell_container > .column_shell");
  column_shell_container.hide().filter(':first').show();
  
  $(".link_to_column_shell").click(function(){
    var column = column_shell_container.filter(this.hash);
    if( !$(this).hasClass('selected') ){
      column_shell_container.not(":hidden").fadeOut("slow", function(){ column.fadeIn("slow"); });
      $('.link_to_column_shell').removeClass('selected');
      $(this).addClass('selected');
    }
    return false;
  }).filter(':first').addClass('selected');
});