测试结果：在IE下：>> 支持keyCode>> 不支持which和charCode,二者值为 undefined在Firefox下：>> 支持keyCode，除功能键外，其他键值始终为 0>> 支持which和charCode，二者的值相同在Opera下：>> 支持keyCode和which，二者的值相同>> 不支持charCode，值为 undefined <script type="text/javascript"> //By 枫岩@IECN.Net function $(s){ return document.getElementById(s)?document.getElementById(s):s; } function viewKeyInfo(e){ var currKey=0,CapsLock=0; var e=e||event; currKey=e.keyCode||e.which||e.charCode; CapsLock=currKey >=65 && currKey <=90; $("type").innerHTML=e['type']; $("currKey").innerHTML=String.fromCharCode(currKey); $("Decimal").innerHTML=currKey; $("keyCode").innerHTML=e['keyCode']; $("charCode").innerHTML=e['charCode']; $("caps").innerHTML=CapsLock; $("shiftKey").innerHTML=e['shiftKey']; $("ctrlKey").innerHTML=e['ctrlKey']; $("repeat").innerHTML=e['repeat']; $("which").innerHTML=e['which']; } document.onkeypress= viewKeyInfo; </script> <p>请按下任意键看测试效果：</p> type:<span id="type"></span> 当前Key:<span id="currKey"></span> Decimal:<span id="Decimal"></span> keyCode:<span id="keyCode"></span> <strong>注：在FF下,keyCode始终为0</strong> which:<span id="which"></span> <strong>注：在IE下,which始终为undefined ； 在Opera下，keyCode和charCode二者的值相同</strong> charCode:<span id="charCode"></span> <strong>注：在IE、Opera下,charCode始终为undefined ; 在FF下，which和charCode二者的值相同</strong> 大写:<span id="caps"></span> altKey:<span id="altKey"></span> ctrlKey:<span id="ctrlKey"></span> shiftKey:<span id="shiftKey"></span> repeat:<span id="repeat"></span> <style type="text/css" media="all"> body {color:#999;font:normal 14px tahoma,宋体,Geneva,Arial,sans-serif;} span {color:#f00;font-weight:bold;padding:0 5px;} strong {color:#090;font-weight:normal;padding:0 5px;} </style> [Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
