<html>
<head>
<title></title>
</head>
<body>
<div>文本框：</div>
<textarea>按下ESC选中我</textarea>
<script src="jquery.min.js" ></script>
<script type="text/javascript">
function hotkey()
{
var a=window.event.keyCode
if(a==27)
{
$('textarea').select()
}
}
// 初始化加载
$(document).ready(function () {
document.onkeydown = hotkey
})
</script>
</body>
</html>
document.onkeydown=function(e){e=e||window.eventif(e.keyCode==116){//116是f5按键代码//yourcodehere}}关闭窗口可以用window.onbeforeunload=function(e){varmsg='您网页上有东西未保存'e=e||window.evente.returnValue=msgreturnmsg}
