<html lang="ja">
<head>
<meta charset="utf-8">
<title>sample</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://ajaxzip3.github.io/ajaxzip3.js" charset="UTF-8"></script>
<script>
$(function() {
$('.js-button').click(function(){
AjaxZip3.zip2addr('zip', '', 'pref', 'city');
});
});
</script>
</head>
<body>
〒<input type="text" name="zip" size="8" maxlength="8"><button class="js-button">自動入力</button>
<br/>
<input type="text" name="pref">
<br/>
<input type="text" name="city">
</body>
</html>
参考
