Core Language Changes - delete Operator, break, continue, switch, do..while, import and export, supports nested functions, Number and String functions
JavaScript Style Sheets - supports CSS and JavaScript Style Sheets
Supports Layers
Regular Expressions (using RegExp object)
New Event Model with methods captureEvents(), enableExternalCapture(), etc. and events: Click, DblClick, DragDrop, KeyDown, KeyPress, KeyUp, MouseDown, MouseMove, MouseOut, MouseOver, MouseUp, Move, Resize