set and get value from href

// set and get value from href
function hrefValue (key, value) {
	'use strict';
	var result,
		regexp,
		replacer,
		href = window.location.href;
	regexp = new RegExp(key + '=([^\;\&\n]+)');
	replacer = function (match, val) {
		return match.replace(val, value);
	};
	result = href.match(regexp);
	if (!result) return false;
	if (value) {
		return href.replace(regexp, replacer);
	} else {
		return result[1];
	}
}