A General use Hash object with some helper methods.

Hash.js

;(function(global,namespace){
if(!namespace) namespace = global;
/* 
---
  name: Hash
  authors: ["Chase Wilson"]
  requires: [typeOf]
  provides: [Hash]
...
*/

var Hash = namespace.Hash = function(options){
	this.initialize(options);
};
Hash.prototype.initialize = function(options){
	this.hash = {};
};
Hash.prototype.toQueryString = function(obj,base){
	var  queryString = []
		,self = this
		,key
		,obj = (obj) ? obj : (this.hash) ? this.hash: false;
	
	// if we don't have an object to create a query off of we need to throw an error.
	if(!obj) throw new Error(this.errors['toQueryString.param']);

	for(key in obj){
		if(obj.hasOwnProperty(key)){
			if (base) key = base + '[' + key + ']';
			var result;
		
			switch (namespace.typeOf(obj[key])){
				case 'object': 
					result = self.toQueryString(object[key], key);
					break;
				case 'array':
					var  qs = {}
						,nested = obj[key]
						,i;
					
					for(i in nested){
						if(nested.hasOwnProperty(i)){
							qs[i] = nested[i];
						}
					}
					result = Hash.toQueryString(qs, key);
					break;
				default: 
					result = key + '=' + encodeURIComponent(obj[key]);
			}
			if (obj[key] != null) queryString.push(result);
		}
	}

	return queryString.join('&');
};
Hash.toQueryString = Hash.prototype.toQueryString;
Hash.errors = {
	"toQueryString.param":"Hash `toQueryString` requires an Object as the first argument."
}

})(global || window, namespace);