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<html lang="ja"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>tryjquery_css_height_set_unit ソース</title> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("#btn1").click(function(){ $("div").height(500); }); $("#btn2").click(function(){ $("div").height("10em"); }); $("#btn3").click(function(){ $("div").height("200pt"); }); }); </script> </head> <body> <button id="btn1">div の高さを 500px に設定</button> <button id="btn2">div の高さを 10em に設定</button> <button id="btn3">div の高さを 200pt に設定</button> <p><b>注：</b> Use "" for em, pt, etc.</p> <div style="height:100px;border:1px solid blue;background-color:lightblue;"></div><br> </body> </html>