'delete' doesn't trigger keypress events in JavaScript

http://unixpapa.com/js/key.html

pecial Keys
Key	ASCII	Mozilla keycodes	IE keycodes	Opera keycodes	pseudo ASCII codes	exceptions
Insert	-	45	45	45	45	Konqueror: 0 Opera < 9.0: 0
Delete	-	46	46	46	46	Konqueror: 127 Opera < 9.0: 0
Home	-	36	36	36	36	Opera < 9.0: 0
End	-	35	35	35	35	Opera < 9.0: 0
Page Up	-	33	33	33	33
Page Down	-	34	34	34	34
Function Keys F1 to F12	-	112 to 123	112 to 123	112 to 123	112 to 123
Keypad Keys

Some browsers avoid this problem by not generating keypress events for special keys. A good case can be made that this is the right thing to do, since these keystrokes are arguably not character events. But such arguments are weakened by the arbitrariness of the division between normal and special keys. Why should the keyboard Backspace key have a keypress event, but not the keypad Delete key? Is Tab really fundamentally different than right arrow?

keypress events
		event.keyCode	event.which	event.charCode
Internet Explorer (Windows)	normal:	ASCII code	undefined	undefined
	special:	no keypress events for special keys
Internet Explorer (Mac)	normal:	ASCII code	undefined	ASCII code
	special:	no keypress events for special keys
Gecko	normal:	zero	ASCII code	ASCII code
	special:	Mozilla keycode	zero	zero
WebKit ≥ 525	normal:	ASCII code	ASCII code	ASCII code
	special:	no keypress events for special keys
WebKit < 525	normal:	ASCII code	ASCII code	ASCII code
	special:	extended ASCII code	extended ASCII code	extended ASCII code
Opera ≥ 10.50 (all platforms)	normal:	ASCII code	ASCII code	undefined
	special:	Mozilla keycode, except keypad and branded keys give Opera keycodes	zero	undefined
Opera ≥ 9.50 (all platforms) Opera 7 (Windows)	normal:	ASCII code	ASCII code	undefined
	special:	Mozilla keycode, except keypad and branded keys give Opera keycodes	zero for arrows, function keys, PageUp, PageDown same as event.keyCode otherwise	undefined
Opera 8.0 to 9.27 (Windows)	normal:	ASCII code	ASCII code	undefined
	special:	Opera keycode	zero for arrows, function keys, PageUp and PageDown, same as event.keyCode otherwise	undefined
Opera < 9.50 (Linux & Macintosh)	normal:	ASCII code	ASCII code	undefined
	special:	Opera keycode	zero for arrows, function keys, PageUp and PageDown, same as event.keyCode otherwise	undefined
Konqueror 4.3	normal:	ASCII code	ASCII code	ASCII code
	special:	Pseudo-ASCII code	Pseudo-ASCII code	zero
Konqueror 3.5	normal:	ASCII code	ASCII code	ASCII code
	special:	Pseudo-ASCII code	zero	zero
Konqueror 3.2	normal:	ASCII code	ASCII code	undefined
	special:	no keypress events for special keys