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<html lang="ja"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>tryjquery_css_offset ソース</title> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("button").click(function(){ var x=$("p").offset(); alert("Top: " + x.top + " Left: " + x.left); }); }); </script> </head> <body> <p>これは段落です。</p> <button>p 要素のオフセット座標を返す</button> </body> </html>