meteora

Hi

i have this code

Meteora.uses('Control.Notebook');

Meteora.onStart(

function () {

var nb = new Notebook('notebook_div');

nb.addPage(

{'id': 'resumen','title': 'Generales'},

$('generales')

);

nb.addPage(

{'id': 'sucursales','title': 'Sucursales'},

{'url': 'clientes_sucursales.pl','data': 'id_cliente='+($('id_cliente').value)}

);

nb.addPage(

{'id': 'equipos','title': 'Equipos'},

{'url': 'clientes_equipos.pl','data': 'id_cliente='+($('id_cliente').value)}

);

}

);

this code work fine on mozilla and ie6 but i can't make this work on ie7. When i clic on a tab i have this error

Unexpected call to method or property access

please help me.