Question

this code line select all the children inputs inside any div who his class name is not “id” and “quantity” ::

$("div.item > div:not(.id,.quantity) > :input").live("keydown",function(event) {});

what is the code line to do the opposite?, something like ::

$("div.item > div:filter(.id,.quantity) > :input").live("keydown",function(event) {});

( of course :filter is not a valid jQuery selector )

Answer 1

I don’t know if I would recommend this, but you can use :not twice:

$("div.item > div:not(:not(.id,.quantity)) > :input")

http://jsfiddle.net/6aW2B/

A better way is to create your own :is selector

$.expr[':'].is = function(elem, index, match){
    return $(elem).is(match[3]);
};

$("div.item > div:is(.id,.quantity) > :input")

http://jsfiddle.net/8Uny2/