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源代码：
点击运行
<!DOCTYPE html> <html> <head> <script src="//cdn.staticfile.net/jquery/1.10.2/jquery.min.js"></script> <script> $(document).ready(function(){ $("input").keyup(function(event){ $("div").html("Key: " + event.which); }); }); </script> </head> <body> Enter your name: <input type="text"> <p>When you type in the field above, the div below will display the key number.</p> <div /> </body> </html>
运行结果