jQuery(document).ready(function($){
  var activeTab = null;

  $(".newsrowextend").click(function(){
    var actObject = $(this).parents('table:first').find('td.newsrowextended');

    if(activeTab)
    {
      activeTab.hide();
      if(actObject.attr('id') != activeTab.attr('id'))
      { 
        actObject.show();
        activeTab=actObject;
      }
      else 
      {
        activeTab=null;
      }
    }
    else
    {
      activeTab=actObject;
      activeTab.show();
    }
  });
});