练习打字js
一个练习打字程序，不兼容firefox，原因是自动获得焦点和截获键盘事件不兼容。
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<html> <head> <title> 打字练习 </title> <script>var timer_handle;var started=0;function creatword(){var random_word=["A","B","C","D","E","F","G","H","I","J","K","L","M","N", "O","P","Q","R","S","T","U","V","W","X","Z"];var index=Math.floor(Math.random()*26);document.word.fallword.value=" "+random_word[index]+" ";}function fallgo(){var height=0;height=document.word.fallword.style.top.slice(0,-2);height=height-1+21;if(height>=680){alert("you loose!");clearInterval(timer_handle);started=0;document.word.fallword.style.top="30px";document.word.fallword.value="ready";}else{document.word.fallword.style.top=height+"px";}}function shot(){if(event.keyCode==13){event.keyCode=9;if(" "+document.word.inputword.value.toUpperCase()+" "==document.word.fallword.value){document.word.fallword.style.top="30px";creatword();document.word.inputword.value="";}}}function startfall(){if(started==0){timer_handle=setInterval("fallgo();",500);creatword();started=1;}}function fff(){document.word.inputword.focus();} </script> </head> <body><form name="word"><input type="text" name="inputword" style="position:absolute;left:550px;top:700px" onkeydown="shot()" onblur="fff();"><input type="button" name="fallword" value="ready" style="position:absolute;left:550px;top:30px"/><input type="button" name="start" value=" 开始 " style="position:absolute;left:600px;top:750px" onclick="startfall();"/></form> </body></html>