W3School TIY
编辑您的代码:
<!DOCTYPE html> <html> <head> <script> function displayResult() { var x; if(window.event) // IE8 以及更早版本 { x=event.keyCode; } else if(event.which) // IE9/Firefox/Chrome/Opera/Safari { x=event.which; } keychar=String.fromCharCode(x); alert("按键 " + keychar + " 被按下"); } </script> </head> <body> <p>当用户在输入字段中按下按键时触发函数。此函数提示用户已按按键。</p> <input type="text" onkeypress="displayResult()"> </body> </html>
查看结果: