session storage

session storage

var  sessionStorage;
$(function () {"use strict";
	if (typeof sessionStorage === 'undefined') {
		sessionStorage = (function () {
			var data = window.top.name ? JSON.parse(window.top.name) : {};
			return {
				clear: function () {
					data = {};
					window.top.name = '';
				},
				getItem: function (key) {
					return data[key] || null;
				},
				key: function (i) {
					// not perfect, but works
					var ctr = 0,
						k;
					for (k in data) {
						if (ctr === i) {
							return k;
						} else {
							ctr += 1;
						}
					}
				},
				removeItem: function (key) {
					delete data[key];
					window.top.name = JSON.stringify(data);
				},
				setItem: function (key, value) {
					data[key] = value + ""; // forces the value to a string
					window.top.name = JSON.stringify(data);
				}
			};
		})();
	}
});