<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>text-button-fn.html</title>
<script src="js/jquery-1.7.1.js"></script>
<script>
$(function(){
var divContents = ['昨天','你','吃饭了吗'];
$('.btn').on('click', function() {
var index = $(this).index('.btn');
$('div').eq(index).text(divContents[index]);
});
});
</script>
</head>
<body>
<div class="div">今天</div>
<div class="div">天气</div>
<div class="div">阴天</div>
<button class="btn">btn1</button>
<button class="btn">btn2</button>
<button class="btn">btn3</button>
</body>
</html>