Serialize a form to a JavaScript object with jQuery

serializeObject.js

function serializeObject($form) {

  var counters = {},
		serialized = {};

	$form.serializeArray().forEach(function(input) {
		// Split name into tokens, fixing numeric indexes where neccessary
		var tokens = input.name.split('[').map(function(value) {
			value = value.replace(']', '');
			if(value === '') {
				if(typeof counters[input.name] == "undefined") {
					counters[input.name] = 0;
				}
				value = counters[input.name]++;
			}
			else if(value.match(/^[0-9]+$/)) {
				value = parseInt(value, 10);
			}
			return value;
		});
		// Add to serialized object
		var ob = serialized;
		tokens.forEach(function(value, index, arr) {
			if(index === tokens.length-1) {
				ob[value] = input.value;
				return;
			}
			if(typeof ob[value] === "undefined") {
				ob[value] = typeof tokens[index + 1] == "number" ? [] : {};
			}
			ob = ob[value];
		});
	});
	return serialized;
}