title: How to remove gaps between frames
body: <p>How to remove gaps between frames?</p>
  
  <p>There were three frame. I want to clear those gaps.</p>
  
  <p><img src="https://i.stack.imgur.com/4HTtS.jpg" alt="enter image description here"></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd"&gt;
  &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
  &lt;head&gt;
  &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt;
  &lt;title&gt;无标题文档&lt;/title&gt;
  &lt;/head&gt;
  &lt;style&gt;
  * {
   margin: 0;
   padding: 0
  }
  &lt;/style&gt;
  &lt;frameset rows="*,18" cols="*" frameborder="no" border="0" noresize framespacing=0 margin:0;padding:0;border:0;&gt;
    &lt;frameset rows="*" cols="343,*" framespacing="0" frameborder="no" border="0"&gt;
      &lt;frame src="UntitledFrame-2.html" name="leftFrame" scrolling="no" noresize="noresize" id="leftFrame" title="leftFrame" /&gt;
      &lt;!-- 2是左侧，1是右侧中间，3是下面的黑色。set-1是主文件  --&gt;
      
      &lt;frame src="Untitled-1.html" name="mainFrame" id="mainFrame" title="mainFrame" /&gt;
    &lt;/frameset&gt;
    &lt;frame src="UntitledFrame-3.html" name="bottomFrame" scrolling="no" noresize="noresize" id="bottomFrame" title="bottomFrame" /&gt;
  &lt;/frameset&gt;
  &lt;noframes&gt;
  &lt;body&gt;
  &lt;iframe src="http://IP:8090/" frameborder="no" width="100%" height="100%" border="0" marginwidth="0" marginheight="0" scrolling="auto"&gt;&lt;/iframe&gt;
  &lt;/body&gt;
  &lt;/noframes&gt;
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>