<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
div{
width: 50px;
height: 50px;
margin: 20px;
float: left;
border: 1px solid orange;
}
</style>
</head>
<body>
<div id="div1">1</div>
<div id="div2">2</div>
<div id="div3">3</div>
<div id="div4">4</div>
<div id="div5">5</div>
<div id="div6">6</div>
<div id="div7">7</div>
<div id="div8">8</div>
<div id="div9">9</div>
<div id="div10">10</div>
</body>
<script type="text/javascript">
//需求：偶数弹出窗口
for (var i=1;i<=10;i++) {
//挨个获取ｄｉｖ
var div=document.getElementById("div"+i);
//得到ｄｉｖ的内容，并转换成数据类型
var num=Number(div.innerHTML);
if(num%2==0){
//将满足条件的ｄｉｖ的点击事件绑定对应的函数体
div.onclick=function(){
alert("popo,coming!");
}
}
}
</script>
</html>