触发历史管理的三种方法：
- 跳转页面
- 改变hash值
- pushState（在服务器环境下运行）
用hash值来触发历史管理：
<!doctype html> <html lang="en"> <head> <title>随机产生彩票号码</title> <meta charset="utf-8"/> <script> window.onload = function(){ var oInput = document.getElementById('input1'); var oDiv = document.getElementById('div1'); var json = {}; oInput.onclick = function(){ var result = randomNum(35,7); var num = Math.random(); json[num] = result; oDiv.innerHTML = result; window.location.hash = num; } window.onhashchange = function(){ if(!this.location.hash.length){ oDiv.innerHTML = ''; return; } oDiv.innerHTML = json[this.location.hash.substring(1)]; } } function randomNum(allNum,selNum){ var arr = []; var newArr = []; for(var i=0;i<allNum;i++){ arr.push(i+1); } for(var j=0;j<selNum;j++){ newArr.push(arr.splice(Math.floor(Math.random()*arr.length),1)); } return newArr; } </script> </head> <body> <input type="button" id="input1" value="随机选号"/> <div id="div1"></div> </body> </html>用pushState来触发历史管理：
<!doctype html> <html lang="en"> <head> <title>随机产生彩票号码</title> <meta charset="utf-8"/> <script> window.onload = function(){ var oInput = document.getElementById('input1'); var oDiv = document.getElementById('div1'); oInput.onclick = function(){ var result = randomNum(35,7); oDiv.innerHTML = result; history.pushState(result,'',Math.random()); //三个参数，第一个参数是保存的值，第二个参数是title（并无用），第三个参数用来设置url } window.onpopstate = function(ev){ oDiv.innerHTML = ev.state; } } function randomNum(allNum,selNum){ var arr = []; var newArr = []; for(var i=0;i<allNum;i++){ arr.push(i+1); } for(var j=0;j<selNum;j++){ newArr.push(arr.splice(Math.floor(Math.random()*arr.length),1)); } return newArr; } </script> </head> <body> <input type="button" id="input1" value="随机选号"/> <div id="div1"></div> </body> </html>