JavaScript概率函数
翻看以前的代码时,发现一个在没事的时候写的小玩意—概率函数,有点像游戏里装备升级成功率的那个玩意,权当自娱自乐。
1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5 <title>试试手气</title> 6 </head> 7 <body> 8 <label>概率值请填写0-1之间的有效数字</label> 9 <input id="val" type="text" value="0.000001"> 10 <input id="click" type="button" value="试试手气"> 11 <br/><br/> 12 <label>结果</label> 13 <input id="res" readonly="readonly" type="text" value=""> 14 <script type="text/javascript"> 15 function Probability(percentage, success, fail){ 16 var len = percentage.toString().length - percentage.toString().indexOf(".") - 1; 17 var randomNum = Math.ceil(Math.random() * Math.pow(10, len)); 18 19 if (randomNum <= percentage * Math.pow(10, len)) { 20 success(); 21 } else { 22 fail(); 23 } 24 } 25 26 var probit = document.getElementById("val"); 27 var result = document.getElementById("res"); 28 document.getElementById("click").onclick = function(){ 29 Probability(probit.value, function(){ 30 result.value = "成功!"; 31 }, function(){ 32 result.value = "失败!"; 33 }); 34 }; 35 </script> 36 </body> 37 </html>
posted on 2012-04-26 09:01 前端组www.qianduanzu.com 阅读(405) 评论(0) 编辑 收藏 举报