[jQuery] div index

[Feijó]

How can I get the index of one of my class? I'm reading all in docs.jquery.com and found nothing     $("#new-criteria").click(function(){         $last = $('#thefilter .qz-tablefield:eq(1)')             .clone(true);        index = 1; // here, how to get the index of "this"?         $('#qz-criteria .qz-tablefield:eq('+index+')').after($last);     }); Thanks Feijó