FileDrop : Cross-browser JavaScript Drag & Drop file upload

FileDrop is a lightweight JavaScript class for easy-to-use file uploading that works out of the box.Self-contained cross-browser pure JavaScript class for Drag & Drop and AJAX (multi) file upload.Features:Cross-browser – supports Firefox 3.6, Internet Explorer 6, Google Chrome 7, SRWare Iron 4, Apple Safari 5 and Opera 11.61.Self-contained & tiny – just 470 lines of code; 8 KiB when minified, 3.5 KiB when gzipped.Various callbacks – on progress, on done, on error and on many other events.Graceful degradation using IFrame fallback.Multiple file selection.Any number of independent FileDrops.