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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> i=0; $(document).ready(function(){ $("p").keypress(function(){ $("span").text(i+=1); }); $("button").click(function(){ $("p").keypress(); }); }); </script> </head> <body> <p>Keypresses: <span>0</span></p> <button>Trigger the keypress event</button> </body> </html>
运行结果