(function($) {
	m = {
		'\b': '\\b',
		'\t': '\\t',
		'\n': '\\n',
		'\f': '\\f',
		'\r': '\\r',
		'"': '\\"',
		'\\': '\\\\'
	},
	$.toJSON = function(value, whitelist) {
		var a,          // The array holding the partial texts.
			i,          // The loop counter.
			k,          // The member key.
			l,          // Length.
			r = /["\\\x00-\x1f\x7f-\x9f]/g,
			v;          // The member value.

		switch (typeof value) {
			case 'string':
				return r.test(value) ?
				'"' + value.replace(r, function(a) {
					var c = m[a];
					if (c) {
						return c;
					}
					c = a.charCodeAt();
					return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16);
				}) + '"' :
				'"' + value + '"';

			case 'number':
				return isFinite(value) ? String(value) : 'null';

			case 'boolean':
			case 'null':
				return String(value);

			case 'object':
				if (!value) {
					return 'null';
				}
				if (typeof value.toJSON === 'function') {
					return $.toJSON(value.toJSON());
				}
				a = [];
				if (typeof value.length === 'number' &&
					!(value.propertyIsEnumerable('length'))) {
					l = value.length;
					for (i = 0; i < l; i += 1) {
						a.push($.toJSON(value[i], whitelist) || 'null');
					}
					return '[' + a.join(',') + ']';
				}
				if (whitelist) {
					l = whitelist.length;
					for (i = 0; i < l; i += 1) {
						k = whitelist[i];
						if (typeof k === 'string') {
							v = $.toJSON(value[k], whitelist);
							if (v) {
								a.push($.toJSON(k) + ':' + v);
							}
						}
					}
				} else {
					for (k in value) {
						if (typeof k === 'string') {
							v = $.toJSON(value[k], whitelist);
							if (v) {
								a.push($.toJSON(k) + ':' + v);
							}
						}
					}
				}
				return '{' + a.join(',') + '}';
		}
	};

})(jQuery);