keyCode： IE、Chrome支持，在FF下,keyCode返回非字符按键的Unicode，如果是字符按键返回始终为0。
which: FF,Chrome支持；在IE下,which和charCode始终为undefined ，jquery方式下和keyCode值相同。
charCode: Chrome支持，在FF下，非字符键返回0，如果是字符按键返回Unicode
<!DOCTYPE html> <html> <head> <title></title> <meta charset="utf-8"> </head> <body> <script src="http://code.jquery.com/jquery-latest.js"></script> <script type="text/javascript"> 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']; $("altKey").innerHTML=e['altKey']; $("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><br /> 当前Key:<span id="currKey"></span><br /> Decimal:<span id="Decimal"></span><br /> keyCode:<span id="keyCode"></span> <strong>注：IE、Chrome支持，在FF下,keyCode返回非字符按键的Unicode，如果是字符按键返回始终为0</strong><br /> which:<span id="which"></span> <strong>注：FF,Chrome支持；在IE下,which和charCode始终为undefined ，jquery方式下和keyCode值相同。</strong><br /> charCode:<span id="charCode"></span> <strong>注：Chrome支持，在FF下，非字符键返回0，如果是字符按键返回Unicode</strong><br /> 大写:<span id="caps"></span><br /> altKey:<span id="altKey"></span><br /> ctrlKey:<span id="ctrlKey"></span><br /> shiftKey:<span id="shiftKey"></span><br /> repeat:<span id="repeat"></span><br /> <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> </body> </html>