<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
.outBox{
width: 200px;
height: 100px;
border-radius: 50px;
background: #CCCCCC;
position: relative;
}
.outBox .cirBox{
width: 100px;
height: 100px;
border-radius: 50px;
background: #41C47E;
position: absolute;
}
</style>
</head>
<body>
<div class="outBox">
<div class="cirBox"></div>
</div>
<script src="jquery-1.11.3.js"></script>
<script>
$('.outBox').on("click",function(){
var leftVal = parseInt($('.cirBox').css('left'));
//alert(leftVal);
if(leftVal == 0){
$('.cirBox').css('left','100px')
}else if(leftVal == 100){
$('.cirBox').css('left','0')
}
})
</script>
</body>
</html>
