12<input type="text" onkeydown="return noNumbers(event)">XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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12345678function noNumbers(e) { var keynum; var keychar; keynum = window.event ? e.keyCode : e.which; keychar = String.fromCharCode(keynum); alert(keynum + ':' + keychar);}XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
获取用户按下的键