JavaScript获取键盘按键的键码(参照表)

document.onkeyup
=
function
(event)
{
 var
e
=
event
?
event
:
window.event;
 if
(e.keyCode
==
13)
{
//旧版火狐、Opera请使用e.which
  alert('您按了回车键。');
 }
};

$(document).on('keyup',function(event){
 if
(event.keyCode
==
13)
{
  alert('您按了回车键。');
 }
});