JavaScript: querystring to json object

location.query.js

// utility function to parse/use query strings
window.query = document.query = (function(window, document, undefined){
	var pairs = window.location.search.slice(1).split('&'),
		result = {};

	pairs.forEach(function(pair){
		pair = pair.split('=');
		result[pair[0]] = decodeURIComponent(pair[1] || '');
	});

	return JSON.parse(JSON.stringify(result));
})(this, this.document);