div上的keyup for backspace没有警告keycode

时间:2012-05-19 17:20:41

标签: javascript jquery html

我的代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
<script src="js/jquery.js"></script>
<script>
$(function(){
 $("div").live("keyup",function(event){
 var code=(event.keyCode ? event.keyCode : event.which); 
 alert(code);return false;
 });

});</script>
</head>

<body>
<div tabindex="0">We will be performing network maintenance today starting at 18:00 UTC - expect a brief scheduled outage</div>
</body>
</html>

它正在警告所有按钮的键码,但按下退格按钮时,浏览器的后退按钮就会起作用。我该怎样阻止它?

1 个答案:

答案 0 :(得分:4)

您可以改为使用keydown事件:

$("div").live("keydown", function(event) {
    var code = (event.keyCode ? event.keyCode : event.which); 
    alert(code);
    return false;
});

同时,退格键的关键代码为8

试一试: http://jsfiddle.net/qfET2/