onkeypress As of Microsoft® Internet Explorer 4.0, the onkeypress event fires and can be canceled for the following keys: Letters: A - Z (uppercase and lowercase) Numerals: 0 - 9 Symbols: ! @ # $ % ^ & * ( ) _ - + = < [ ] { } , . / ? \ | ' ` " ~ System: ESC, SPACEBAR, ENTER onkeydown As of Microsoft® Internet Explorer 4.0, the onkeydown event fires for the following keys: Editing: DELETE, INSERT Function: F1 - F12 Letters: A - Z (uppercase and lowercase) Navigation: HOME, END, LEFT ARROW, RIGHT ARROW, UP ARROW, DOWN ARROW Numerals: 0 - 9 Symbols: ! @ # $ % ^ & * ( ) _ - + = < [ ] { } , . / ? \ | ' ` " ~ System: ESC, SPACEBAR, SHIFT, TAB As of Internet Explorer 5, the event also fires for the following keys: Editing: BACKSPACE Navigation: PAGE UP, PAGE DOWN System: SHIFT+TAB As of Internet Explorer 5, this event can be canceled for the following keys and key combinations by specifying event.returnValue=false: Editing: BACKSPACE, DELETE Letters: A - Z (uppercase and lowercase) Navigation: PAGE UP, PAGE DOWN, END, HOME, LEFT ARROW, RIGHT ARROW, UP ARROW, DOWN ARROW Numerals: 0 - 9 Symbols: ! @ # $ % ^ & * ( ) _ - + = < [ ] { } , . / ? \ | ' ` " ~ System: SPACEBAR, ESC, TAB, SHIFT+TAB You can cancel all keys that fire the onkeydown event in HTML Applications, including most accelerator keys, such as ALT+F4.In Internet Explorer 4.0, you cannot cancel the onkeydown event, but you can use the onkeypress event to cancel keyboard events.两个一起按，可以这样：if( window.event.shiftKey && event.keyCode==xx)
onkeydown先于onkeypress
As of Microsoft® Internet Explorer 4.0, the onkeypress event fires and can be canceled for the following keys: Letters: A - Z (uppercase and lowercase)
Numerals: 0 - 9
Symbols: ! @ # $ % ^ & * ( ) _ - + = < [ ] { } , . / ? \ | ' ` " ~
System: ESC, SPACEBAR, ENTER
onkeydown
As of Microsoft® Internet Explorer 4.0, the onkeydown event fires for the following keys: Editing: DELETE, INSERT
Function: F1 - F12
Letters: A - Z (uppercase and lowercase)
Navigation: HOME, END, LEFT ARROW, RIGHT ARROW, UP ARROW, DOWN ARROW
Numerals: 0 - 9
Symbols: ! @ # $ % ^ & * ( ) _ - + = < [ ] { } , . / ? \ | ' ` " ~
System: ESC, SPACEBAR, SHIFT, TAB As of Internet Explorer 5, the event also fires for the following keys: Editing: BACKSPACE
Navigation: PAGE UP, PAGE DOWN
System: SHIFT+TAB As of Internet Explorer 5, this event can be canceled for the following keys and key combinations by specifying event.returnValue=false: Editing: BACKSPACE, DELETE
Letters: A - Z (uppercase and lowercase)
Navigation: PAGE UP, PAGE DOWN, END, HOME, LEFT ARROW, RIGHT ARROW, UP ARROW, DOWN ARROW
Numerals: 0 - 9
Symbols: ! @ # $ % ^ & * ( ) _ - + = < [ ] { } , . / ? \ | ' ` " ~
System: SPACEBAR, ESC, TAB, SHIFT+TAB You can cancel all keys that fire the onkeydown event in HTML Applications, including most accelerator keys, such as ALT+F4.In Internet Explorer 4.0, you cannot cancel the onkeydown event, but you can use the onkeypress event to cancel keyboard events.两个一起按，可以这样：if( window.event.shiftKey && event.keyCode==xx)