js代码解读 在线等 很急

Question

来自于   千年-today
        var curCount;
        var ranCount;
        var curTotal=0;
        var Count = document.getElementsByTagName("td");
        var time = 10;  //初始时间为10
        var overRandom;
        var overClear;
        var overSub;
        
        function randomCount(){
            var ran = Math.random()*9|0;//随机一个1到9的数
            curCount = document.getElementById(ran);
            curCount.style.backgroundImage="url(images/1.jpg)"; //背景图片为地鼠出现
            curCount.style.backgroundSize="cover";
            curCount.state="yes";                            
            ranCount=ran;
        }
        //清空9个方格
        function clear(){
            for(var i=0;i<9;i++){
               var forCount = document.getElementById(i);
               forCount.style.backgroundImage="url(images/2.jpg)";
               forCount.style.backgroundSize="cover";
               forCount.state="no";
            }
        }
        //点击砸中地鼠
        function onClick(v){
            
            if(v.state=="yes"){
            v.style.backgroundImage="url(images/3.jpg)";
            v.style.backgroundSize="cover";
            curTotal++;
            document.getElementById("put").value="打到"+curTotal+"个";
            }
            
        }
        //时间减少
        function timeSub(){
            time--;
            document.getElementById("time").value="剩余时间"+time+"s";
            if(time<=0){
                window.clearInterval(overRandom);
                window.clearInterval(overClear);
                window.clearInterval(overSub);
                clear();
                alert("游戏结束，你打到了"+curTotal+"个");
            }
        }
        //用定时器周期生成和清空地鼠
        function start(){
         time=10;
         curTotal=0;
         overRandom = window.setInterval("randomCount()",600);
         overClear = window.setInterval("clear()",2100);
         overSub = window.setInterval("timeSub()",1000);
        }
  
哪位大神能详细的解读一下，感激不尽！在线等，挺急的
  

Answer 1

<script type="text/javascript">
        /* 应该是一个9宫格打地鼠游戏 */
        // 当前地鼠出现的格子的dom
        var curCount;
        // 当前地鼠出现的格子数
        var ranCount;
        // 总共打倒的地鼠个数
        var curTotal=0;
        // 格子数量
        var Count = document.getElementsByTagName("td");
        var time = 10;  //初始时间为10        // 定义三个循环定时器的变量
        var overRandom;
        var overClear;
        var overSub;
        
        // 获取1-9随机数，得到的随机数即地鼠出现的格子
        function randomCount(){
            var ran = Math.random()*9|0;//随机一个1到9的数
            // 获取指定格子的地鼠dom
            curCount = document.getElementById(ran);
            // 设置该格子的背景为地鼠背景图,即地鼠出现
            curCount.style.backgroundImage="url(images/1.jpg)"; //背景图片为地鼠出现
            // 设置为背景图覆盖样式
            curCount.style.backgroundSize="cover";
            // 设置自定义的属性state状态为yes,表示该格子没有地鼠
            curCount.state="yes";                            
            // 全局变量ranCount赋值，代表当前地鼠出现的格子
            ranCount=ran;
        }
        //清空9个方格
        function clear(){
            for(var i=0;i<9;i++){
                // 循环获取地鼠格子
               var forCount = document.getElementById(i);
               // 把所有背景替换成默认图片
               forCount.style.backgroundImage="url(images/2.jpg)";
               forCount.style.backgroundSize="cover";
               // 设置自定义的属性state状态为no
               forCount.state="no";
            }
        }
        //点击砸中地鼠
        function onClick(v){
            // 根据当前格子是否存在地鼠来进入条件
            if(v.state=="yes"){
              // 这里应该是地鼠被砸中了
            v.style.backgroundImage="url(images/3.jpg)";
            v.style.backgroundSize="cover";
            // 打到的地鼠个数叠加
            curTotal++;
            document.getElementById("put").value="打到"+curTotal+"个";
            }
            
        }
        //时间减少
        function timeSub(){
            time--;
            // 获取显示时间的dom
            document.getElementById("time").value="剩余时间"+time+"s";
            // 当时间结束
            if(time<=0){
                // 清除循环定时器调用生成地鼠的函数 randomCount
                window.clearInterval(overRandom);
                // 清除循环定时器调用清理格子的函数 clear
                window.clearInterval(overClear);
                // 清除循环定时器调用计时的函数 timeSub
                window.clearInterval(overSub);
                // 顺便清理一下所有格子为初始化状态
                clear();
                alert("游戏结束，你打到了"+curTotal+"个");
            }
        }
        //用定时器周期生成和清空地鼠
        function start(){
         time=10;
         curTotal=0;
         // 开启循环定时器 randomCount, 600毫秒执行一次
         overRandom = window.setInterval("randomCount()",600);
         // 开启循环定时器 clear, 2100毫秒执行一次
         overClear = window.setInterval("clear()",2100);
         // 开启循环定时器 timeSub, 1000毫秒执行一次
         overSub = window.setInterval("timeSub()",1000);
        }
  </script>