随机点名并 计数

var wrap=document.getElementsByClassName(‘wrap’)[0]; var count=document.getElementsByClassName(‘count’)[0]; var arr=[‘lingling’,‘weiwei’,‘tangtang’,‘huanhuan’,‘yuanyuan’]; for(var i=0;i<arr.length;i++){ var div=document.createElement(‘div’); div.setAttribute(‘class’,‘box’); div.innerHTML=arr[i]; wrap.appendChild(div); } var arrCount=[0,0,0,0,0];

var btn=document.getElementsByTagName('button')[0]; var box=document.getElementsByClassName('box'); btn.addEventListener('click',function(){ for(var i=0;i<box.length;i++){ box[i].style.backgroundColor=''; } var num=Math.floor(Math.random()*5); box[num].style.backgroundColor='#abcdef'; // box[num].classList.add('i'); arrCount[num]++; count.innerHTML=arrCount;