javascript - 如何使用 Javascript 知道按下的键？

Question

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Possible Duplicate:
js: how to find out what character key is pressed?

我想知道如何在按键时生成事件并仅使用 JavaScript 指定按下哪个键。

Answer 1

<script type="text/javascript">
    function myKeyPress(e){

        var keynum;

        if(window.event){ // IE                 
            keynum = e.keyCode;
        }else
            if(e.which){ // Netscape/Firefox/Opera                  
                keynum = e.which;
             }
        alert(String.fromCharCode(keynum));
    }
   </script>


 <form>
  <input type="text" onkeypress="return myKeyPress(event)" />
 </form>

引用自How to find out what character key is pressed?