转盘抽奖

<div class="turntableWap top10">
    <table border="0" cellspacing="0">
      <tr>
        <td tag="0"><img src="../images/4.png" alt="4元"></td>
        <td tag="1" class="even"><img src="../images/6.png" alt="6元"></td>
        <td tag="2"><img src="../images/8.png" alt="8元"></td>
        <td tag="3" class="even"><img src="../images/11.png" alt="11元"></td>
      </tr>
      <tr>
        <td tag="13" class="even"><img src="../images/13.png" alt="13元"></td>
        <td colspan="2" rowspan="3" class="zpBtn"><img src="../images/zpBtn.jpg" /></td>
        <td tag="4"><img src="../images/40.png" alt="40元"></td>
      </tr>
      <tr>
        <td tag="12"><img src="../images/80.png" alt="80元"></td>
        <td tag="5" class="even"><img src="../images/125.png" alt="125元"></td>
      </tr>
      <tr>
        <td tag="11" class="even"><img src="../images/250.png" alt="250元"></td>
        <td tag="6"><img src="../images/400.png" alt="400元"></td>
      </tr>
      <tr>
        <td tag="10"><img src="../images/1000.png" alt="1000元"></td>
        <td tag="9" class="even"><img src="../images/iphone6.png" alt="iphone6"></td>
        <td tag="8"><img src="../images/Thank2.png" alt="谢谢惠顾"></td>
        <td tag="7" class="even"><img src="../images/500.png" alt="500元"></td>
      </tr>
    </table>

    </div>

.turntableWap{ padding:1rem; background:url(../images/zpTabBg.jpg) no-repeat center; background-size:100% 100%;}
.turntableWap table{ width:100%;}
.turntableWap table td{ vertical-align:middle; text-align:center; background-color:#ecd295;}
.turntableWap table td img{ width:100%; }
.turntableWap table td.even{background-color:#f6e8c5}
.turntableWap table td.active{ background-color:#ed9351;}

$(".turntableWap .table").css({"height":$(".turntableWap .table").width()});//做响应式布局，外table是等宽高
var isdo = true;
$(".zpBtn").on("click",function(){
    var num = 13;//后台传入的奖品
    var rotaNum = 14;//奖品数量
    var count = -1;//高亮显示，旋转特效
    var jishi = 0;//计时时间段
    var speed = 50;//快速速度
    var speedSlow = 200;//慢速速度
    choujiang()//抽奖方法调用，在此处做判断调用choujiang()，并给num值
    function choujiang(){
        if(isdo){
            isdo=false;
            $(".turntableWap").css({"background-image":"url(../images/1.gif)"})
            var c = setInterval(function(){
                if(count >12){
                    count = -1;
                }
                count = count+1;
                jishi = jishi+1;
                $(".turntableWap td").removeClass("active");
                $(".turntableWap td[tag="+count+"]").addClass("active");
                if(jishi>rotaNum*2){
                    clearInterval(c);
                    c = setInterval(function(){
                        count = count+1;
                        jishi = jishi+1;
                        $(".turntableWap td").removeClass("active");
                        $(".turntableWap td[tag="+count+"]").addClass("active");
                        if(jishi>num+rotaNum*2){
                            clearInterval(c);
                            $(".turntableWap").css({"background-image":"url(../images/zpTabBg.jpg)"})
                            isdo = true;
                            var jp = $(".turntableWap td[tag="+count+"]").find("img").attr("alt")
                            alert("恭喜您获取"+jp)
                        }
                    },speedSlow)
                }
            },speed)
        }else{
            return;
        }
    }
})