js实现随机点名器的思路
利用setTimeout()计时器实现随机的效果，功能函数
function show(){ var box=window.document.getElementById("box"); var num=Math.floor((Math.random()*100000))%namelist.length; box.innerHTML=namelist[num]; mytime=setTimeout("show()",1); }
完整代码如下：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>点击按钮随机点名-样式布局参考</title> <style type="text/css"> #box { margin: auto; width: 660px; font-size: 66px; height: 94px; color: #138eee; text-align: center; margin-top: 200px; } #bt { margin: auto; width: 200px; text-align: center; margin-top: 75px; color: #fff; font-size: 25px; cursor: pointer; } </style> <script type="text/javascript"> var namelist=["张三","李四","王五","赵六","孙七"]; var mytime=null; function doit(){ var bt=window.document.getElementById("bt"); if(mytime==null){ bt.innerHTML="停止"; show(); } else{ bt.innerHTML="开始点名"; clearTimeout(mytime); mytime=null; } } function show(){ var box=window.document.getElementById("box"); var num=Math.floor((Math.random()*100000))%namelist.length; box.innerHTML=namelist[num]; mytime=setTimeout("show()",1); } </script> </head> <body> <div>亲，准备好点名了吗？</div> <div>开始点名</div> </body> </html>