Best review of functions of HTML5 AJAX multiuploader give you watching this short sceencast .

HTML5 AJAX multiuploader bring comfort of Flash uploaders by using pure HTML & Javascript. It is mainly intended as comfort tool for uploading of multiple images in one shot. With moder browser you can add files to upload queue by simple drag ‘n drop. Also nice lightbox effect is ready to preview your images before upload to the gallery.

HTML5 AJAX multiuploader allows you among other things:

• Select image to upload in standard file dialog (only in dumb browsers)
• Drag and Drop images into upload queue
• Review images before upload with nice lightbox effect
• Remove unwanted images from upload queue
• Upload queued images by AJAX one-after-one
• Watch upload process by progress bars (current & total)
• View stored images in simple gallery

Skilled coders can easily modify beahvior of HTML5 AJAX multiuploader. Configuration variables are stored together in nice formated config files. Use of modern & advanced PHP 5.1 framework ( Yii ) give you ability to extend HTML5 AJAX multiuploader to suit your needs.