Parse/Prepare Query String (JavaScript)

querystring.js

/**
 * @function parseQueryString
 * Parse query string and return object containing parameters and their values.
 * @param {string} the (encoded) query string to parse
 * @return {object} the parsed query string object
 */
var parseQueryString = function( string ) {
	var query = {};
	string.split('&').forEach(function(item) {
		query[item.split('=')[0]] = decodeURIComponent(item.split('=')[1]);
	});
	return query;
};

/**
 * @function prepareQueryString
 * Prepare an encoded query string from an object of parameters and their values.
 * @param {object} the parsed parameter object
 * @return {string} the encoded query string
 */
var prepareQueryString = function( object ) {
	var string = [];
	for (var param in object) {
		if (object.hasOwnProperty(param)) string.push(encodeURIComponent(param) + "=" + encodeURIComponent(object[param]));
	}
	return '?' + string.join("&");
};