<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>排他</title>
<style>
p {
width: 100px;
height: 100px;
background-color: skyblue;
float: left;
margin-right: 10px;
}
</style>
</head>
<body>
<p>0</p>
<p>1</p>
<p>2</p>pa
<p>3</p>
<p>4</p>
<p>5</p>
<script>
var ps = document.getElementsByTagName("p");
for (var i = 0;i < ps.length;i++){
ps[i].onclick = function(){
//把所有的改成原来的
for (var j = 0;j < ps.length;j++){
ps[j].style.background = "";
}
//把自己想要的
this.style.background = "red";
}
}
</script>
</body>
</html>
