下面的例子可返回 iframe 顶部和底部的页面空白:
</>code
- <html>
- <body>
- <iframe src="frame_a.htm" id="frame1" marginheight="50"></iframe>
- <br />
- <script type="text/javascript">
- x=document.getElementById("frame1");
- document.write("Top and bottom margins of the iframe are: ");
- document.write(x.marginHeight);
- </script>
- </body>
- </html>
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