Index: event.js
===================================================================
--- event.js	(revision 6297)
+++ event.js	(working copy)
@@ -464,6 +464,39 @@
 	};			   
 });
 
+var mousewheelTypes = ['DOMMouseScroll', 'mousewheel'];
+function mousewheelHandler(event) {
+	var args = [].slice.call( arguments, 1 ), delta = 0, returnValue = true;
+	
+	event = jQuery.event.fix(event || window.event);
+	event.type = "mousewheel";
+	
+	if ( event.wheelDelta ) delta = event.wheelDelta/120;
+	if ( event.detail     ) delta = -event.detail/3;
+	
+	// Add events and delta to the front of the arguments
+	args.unshift(event, delta);
+
+	return jQuery.event.handle.apply(this, args);
+};
+jQuery.event.special.mousewheel = {
+	setup: function() {
+		if ( this.addEventListener )
+			for ( var i=types.length; i; )
+				this.addEventListener( types[--i], handler, false );
+		else
+			this.onmousewheel = handler;
+	},
+	
+	teardown: function() {
+		if ( this.removeEventListener )
+			for ( var i=types.length; i; )
+				this.removeEventListener( types[--i], handler, false );
+		else
+			this.onmousewheel = null;
+	}
+};
+
 jQuery.fn.extend({
 	bind: function( type, data, fn ) {
 		return type == "unload" ? this.one(type, data, fn) : this.each(function(){
@@ -665,7 +698,7 @@
 }
 
 jQuery.each( ("blur,focus,load,resize,scroll,unload,click,dblclick," +
-	"mousedown,mouseup,mousemove,mouseover,mouseout,mouseenter,mouseleave," +
+	"mousedown,mouseup,mousemove,mouseover,mouseout,mouseenter,mouseleave,mousewheel" +
 	"change,select,submit,keydown,keypress,keyup,error").split(","), function(i, name){
 
 	// Handle event binding