<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title></title>
<script type="text/javascript" src="js/jquery-2.1.0.min.js"></script>
<style type="text/css">
* {
margin: 0px;
padding: 0px;
}
html,
body {
width: 100%;
font-size: 16px;
min-width: 1305px;
overflow: hidden;
}
ul {
list-style: none;
width: 100%;
background: gray;
}
li {
margin: 11px;
text-align: center;
display: inline-block;
width: 200px;
height: 20px;
border: 1px solid red;
}
li:nth-child(5n+1) {
margin-left: 111px;
}
</style>
<script type="text/javascript">
$(function() {
$('ul li').eq(0).css('background', 'green');
})
</script>
</head>
<body>
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
<li>7</li>
<li>8</li>
<li>9</li>
<li>10</li>
</ul>
</body>
</html>
