<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>雪花下落</title>
</head>
<style>
.box{
height: 600px;
width: 800px;
border: 1px solid red;
position: relative;
overflow: hidden;
}
.box div{
position:absolute;
}
</style>
<body>
<div class="box" ;
if(poY>600){//当雪花超出容器时的处理事件
clearInterval(time2);//清除计时器
box.removeChild(obj);//删除超出容器的节点对象
}
}
time2=setInterval(move,10);
}
</script>
</html>
相关文章：