Upload an image using class.upload.php via AJAX, display image in form using jQuery

I am using class.upload.php to handle an开发者_高级运维 image upload from a form that submits employee details to a MySQL database. class.upload.php does EXACTLY what I want it to do, resize the image and rename it - what I am now trying to accomplish is to upload via Ajax after the user selects the file and then display it in the form while they continue entering details. How would this best be accomplished with jQuery?

I have used Uploadify to serve this purpose on several websites. It works quite well once you get the hang of it.