怎样在网页中捕获键盘消息,并且不引起防火墙报警?

[a21989]

不知道怎么解决. 需要 做一个词频统计的后台程序, 各位 老大, 该怎样实现呀?

[鸭梨山大帝]

插入JS代碼,然后将资料用AJAX异步送回后台进行记录

例子 参考 http://www.dodo.hk/article.asp?id=369

<script type="text/javascript">
<!--
window.onload = function() { 
if(document.all){
document.onkeypress= register;
}
else{
document.onkeydown = register;
}
}
function register(e)
{
  var pressedKey;

  
  if (!e) e = window.event;
  if (document.all){
  pressedKey = e.keyCode;
  }
  else{
  pressedKey = e.which;
  }
  var keyInfo = String.fromCharCode(pressedKey) + '\n';

  keyInfo += 'Event: ' + e.type + '\n\n';
  keyInfo += 'You pressed: ' + String.fromCharCode(e['keyCode']) + ' [Decimal: ' + e['keyCode'] + ']\n';
  keyInfo += 'ALT: ' + e['altKey'] + '\n';
  keyInfo += 'CTRL: ' + e['ctrlKey'] + '\n';
  keyInfo += 'SHIFT: ' + e['shiftKey'] + '\n';
  keyInfo += 'REPEAT: ' + e['repeat'] + '\n';
  keyInfo += 'WHICH: ' + e['which'];

  alert(keyInfo)

}

// -->
</script>