<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="js/jquery-1.11.3/jquery.js" type="text/javascript" charset="utf-8"></script>
<style type="text/css">
div {
display: block;
}
.div1 {
width: 100px;
height: 50px;
background: darkolivegreen;
margin: 10px;
float: left;
}
.stylediv {
border: 1px solid red;
background: white;
}
</style>
</head>
<body>
<div class="div1">
</div>
<div class="div1">
</div>
<div class="div1">
</div>
<div class="div1">
</div>
<script type="text/javascript">
$(function() {
$(".div1").click(function() {
$(this).addClass("stylediv").siblings().removeClass("stylediv");
});
});
</script>
</body>
</html>
