fixedFloat.htm
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>固定浮动布局-三列</title><link rel="stylesheet" style="text/css" href="style2.css"></head><body> <div id="header"><h1 id="上标题">上标题</h1></div> <div id="body"> <div id="navl">左导航</div> <div id="main">中内容</div> <div id="navr">右导航</div> </div> <div id="footer"><p>下版权</p></div></body></html>
style.css
/* CSS Document */*{ margin:0; padding:0;}body{ margin:10px;}#header{ border:1px solid black; width:600px; height:60px; margin:0 auto; margin-bottom:10px;}#header h1{ height:60px; line-height:60px; font-size:16px; text-align:center;}#body{ width:600px; margin:0 auto;}#navl{ border:1px solid black; width:150px; height:500px; float:left; margin-bottom:10px; background:lightcyan;}#main{ border:1px solid black; width:294px;/*边框也算一个像素*/ height:500px; float:left; margin-bottom:10px; background:lightblue;}#navr{ border:1px solid black; width:150px; height:500px; float:right; margin-bottom:10px; background:lightyellow;}#footer{ border:1px solid black; width:600px; height:60px; line-height:60px; margin:0 auto; text-align:center; clear:both;} The effect is as follows:
The advantage of this layout is that since the width and height of the div are fixed, changing the size of the browser window does not affect the display of the div.
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HTML: Building the Structure of Web PagesApr 14, 2025 am 12:14 AMHTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.
From Text to Websites: The Power of HTMLApr 13, 2025 am 12:07 AMHTML is a language used to build web pages, defining web page structure and content through tags and attributes. 1) HTML organizes document structure through tags, such as,. 2) The browser parses HTML to build the DOM and renders the web page. 3) New features of HTML5, such as, enhance multimedia functions. 4) Common errors include unclosed labels and unquoted attribute values. 5) Optimization suggestions include using semantic tags and reducing file size.
Understanding HTML, CSS, and JavaScript: A Beginner's GuideApr 12, 2025 am 12:02 AMWebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.
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