Does JQuery support Dictionaries (key, value) collection?

No, jQuery doesn’t, but Javascript does.

Just use an object:

var dict = {
  "1" : false,
  "2" : true,
  "3" : false
};

// lookup:
var second = dict["2"];
// update:
dict["2"] = false;
// add:
dict["4"] = true;
// delete:
delete dict["2"];