img要素のalt属性に値を
alt属性の値：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ja" lang="ja">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Language" content="ja" />
<meta http-equiv="Content-Script-Type" content="text/javascript" />
<meta http-equiv="Content-Style-Type" content="text/css" />
<meta http-equiv="imagetoolbar" content="no" />
<title>DOM要素の属性(Attirbutes)：属性（Attr）：attr()の使用例 | jQuery</title>
<link rel="stylesheet" type="text/css" href="/content/lib/global.css" />
<!-- JS -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script type="text/javascript">
$(function(){
$("#btn_add_attr").click(function(){
$("#sample").attr("alt","くまさんケーキ");
$("#res").text($("#sample").attr("alt"));
});
$("#btn_remove_attr").click(function(){
$("#sample").removeAttr("alt");
$("#res").text($("#sample").attr("alt"));
});
});
</script>
<link rel="stylesheet" type="text/css" href="/common/css/example.css"></head>
<body id='example3' class='example'><div class="ads" style="margin:32px auto;text-align:center;"></div><h1 class='h'><a href='/'>PHP & JavaScript Room</a> :: 設置サンプル</h1>
<h3 class='h'>実行結果</h3>
<div id="wrap">
<h1>DOM要素の属性(Attirbutes)：属性（Attr）：attr()の使用例 | jQuery</h1>
<!-- CODE -->
<p>
img要素のalt属性に値を<button id="btn_add_attr">設定</button>
<button id="btn_remove_attr">削除</button>
</p>
<p><img id="sample" src="http://farm4.static.flickr.com/3222/2974008614_736e2d5b50_t.jpg" width="100" height="75" /></p>
<p>alt属性の値：<strong id="res"></strong></p>
<!-- CODE / -->
</div>
</body>
</html>
