I personally starting to work with jquery using live function:

$('#boton_creador').click(function(){
$('#algo').before('');
});

$('#aun_no_creado').live('click', function(){
$(this).parent('div').animate({opacity: 'hide', height: 'hide', marginBottom: '0px'}, 'fast',
function () {
$(this).remove();
});
return false;
});