您可以使用 input (FF) 和 propertychange(所有其他)事件来捕获所有表单输入包括键盘和人民币剪切粘贴.

You can use the input (FF) and propertychange (all others) events to catch all forms of input including keyboard and rmb cut paste.

http://jsfiddle.net/dFBzW/

$('input').bind('input propertychange', function() {
    $('#output').html($(this).val());
});