toQueryString.js

YUI('lang', function (Y) {
    YAP.toQueryString = function (obj, name) {
        switch (Y.Lang.type(obj)) {
           case 'undefined':
           case 'null':
               return name ? encodeURIComponent(name) + '=' : '';

           case 'boolean': obj = +obj; // intentional fallthrough
           case 'number':
           case 'string':
               return encodeURIComponent(name) + '=' + encodeURIComponent(obj);

           case 'array':
               var s = [], i, l;
               name = name + '[]';
               for (i = 0, l = obj.length; i < l; ++i) {
                   s[i] = arguments.callee(obj[i], name);
               }
               return s.join('&');

           case 'object': // all other types are assumed to be objects
               var s = [],
                   begin = name ? name + '[' : '',
                   end = name ? ']' : '',
                   key;

                for (key in obj) {
                    if (obj.hasOwnProperty(key) && p.slice(-3) !== '___') {
                        s.push(arguments.callee(obj[key], begin + key + end));
                    }
                }

                return s.join("&");

           default: return ''; // functions, regex, errors not acceptable
    };
});