queryString.js

/**
 * queryString handler
 * by Sergio Melendez
 * 
 * Usage:
 * 	url = location.pathname + getQuery().set('foo', 'bar').remove('baz');
*/

function getQuery() {
	var data = {};
	
	location.search.substr(1).split('&').forEach(function (q) {
		var s = q.split('='),
			k = s[0],
			v = s[1] && decodeURIComponent(s[1]);
		
		if (k) data[k] = [v];
	});
	
	return new function () {
		this.data = data;
		this.toString = function () { return setQuery(this.data); };
		this.set = function (key, val) { this.data[key] = val; return this; };
		this.remove = function (key) { delete this.data[key]; return this; }
	};
}

function setQuery(data) {
	var query = [];
	
	for (var i in data) {
		query.push(i.toString() + '=' + data[i].toString());
	}
	
	return '?' + query.join('&');
}