How to store objects in HTML5 localStorage/sessionStorage

I'd like to store a JavaScript object in HTML5 localStorage, but my object is apparently being converted to a string. I can store and retrieve primitive JavaScript types and arrays using localStorage, but objects don't seem to work. Should they? Here's my code: var testObject = { 'one': 1, 'two': 2, 'three': 3 }; console.log('typeof testObject: ' + typeof testObject); console.log('testObject prope