$('tabstrip').childElements().each(function(e,i){
 e.observe('click',function(event){
   var tab_id = this.id
   var selected = 'gaw_' + tab_id.substr(4).replace('-','_');
   $('tabpanels').childElements().each(function(panel){
     if (panel.id == selected){
        panel.show();
     } else {
        panel.hide();
     }
   });
   $('tabstrip').select('li span').each(function(s, j){
     if (s.parentNode.id == tab_id){
       s.addClassName('active');
     } else {
       s.removeClassName('active');
     }
   });
 });
});