1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <title>Document</title>
6 </head>
7 <body>
8 <input type="button" value="随机" id="btn1">
9 <div id="div1"></div>
10 <script>
11 var oBtn = document.getElementById("btn1");
12 var oDiv = document.getElementById("div1");
13 var obj = {};
14
15 oBtn.onclick = function(){
16 var number = randomNum(35,7);
17 oDiv.innerHTML = number;
18
19 var oRD = Math.random();
20 obj[oRD] = number;
21
22 window.location.hash = oRD;
23 };
24
25 window.onhashchange = function(){
26 //undefined时为空
27 var number = obj[ window.location.hash.substring(1) ] || "";//去掉#
28 oDiv.innerHTML = number;
29 };
30 function randomNum(alls,now){
31 var arr = [];
32 var newArr = [];
33
34 for(var i = 1;i <= alls;i ++){
35 arr.push(i);
36 }
37
38 for(var i = 0;i < now;i ++){
39 //Math.random() [0,1)
40 //Math.floor( Math.random() * arr.length 0~34
41 newArr.push( arr.splice(Math.floor( Math.random() * arr.length ),1) );//删除并返回被删除元素的数组
42 }
43 return newArr;//是一个二维数组
44 }
45
46 </script>
47 </body>
48 </html>
时间： 2024-08-10 19:15:54