效果预览:http://hovertree.com/code/texiao/ks63r6aq.htm
1 <!DOCTYPE html> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <title>超漂亮的HTML导航菜单CSS代码 - 何问起</title> 5 <style> 6 #top { 7 display: block; 8 text-align: left; 9 height: 105px; 10 position: relative; 11 z-index: 0; 12 } 13 14 .m { 15 margin: 0 auto; 16 width: 970px; 17 } 18 19 body { 20 font-size: 12px; 21 } 22 23 a { 24 color: #333; 25 text-decoration: none; 26 } 27 28 a:link { 29 text-decoration: none; 30 } 31 /* Download by http://hovertree.com*/ 32 a.blue:link, a.blue:visited { 33 color: #014cc9; 34 text-decoration: none; 35 } 36 37 a.blue:hover, a.blue:active { 38 color: #014cc9; 39 text-decoration: underline; 40 } 41 42 a.org:link, a.org:visited { 43 color: #ff4e00; 44 text-decoration: none; 45 } 46 47 a:hover, a:active, a.org:hover, a.org:active { 48 color: #ff4e00; 49 text-decoration: underline; 50 } 51 52 #navpart { 53 background: url(http://hovertree.com/hvtimg/bjafjb/6hcuxj1x.gif) repeat-x center top; 54 height: 105px; 55 width: 950px; 56 z-index: 0; 57 margin-top: 0; 58 margin-right: auto; 59 margin-bottom: 0; 60 margin-left: auto; 61 clear: both; 62 position: relative; 63 } 64 65 #navpart .sideleft { 66 background: url(http://hovertree.com/hvtimg/bjafjb/6hcuxj1x.gif) no-repeat left bottom; 67 float: left; 68 height: 105px; 69 width: 6px; 70 } 71 72 #navpart .sideright { 73 background: url(http://hovertree.com/hvtimg/bjafjb/6hcuxj1x.gif) no-repeat right bottom; 74 float: right; 75 height: 105px; 76 width: 6px; 77 } 78 79 #navmenubar { 80 height: 32px; 81 float: left; 82 display: inline; 83 margin: 0 -6px; 84 width: 100%; 85 position: relative; 86 z-index: 3; 87 top: 0; 88 } 89 90 #hot { 91 background: url(http://hovertree.com/hvtimg/201508/7qmwfe9p.png) no-repeat left top; 92 height: 21px; 93 width: 19px; 94 position: absolute; 95 top: -5px; 96 right: 2px; 97 z-index: 666; 98 background:black; 99 }100 101 #navmenubar .sideleft {102 background: url(http://hovertree.com/hvtimg/bjafjb/ay73nxk5.gif) no-repeat left bottom;103 float: left;104 height: 32px;105 width: 6px;106 display: inline;107 margin: 0 0 0 8px;108 }109 110 #navmenubar .sideright {111 background: url(http://hovertree.com/hvtimg/bjafjb/ay73nxk5.gif) no-repeat right bottom;112 float: left;113 height: 32px;114 width: 6px;115 display: inline;116 margin: 0 4px 0 -2px;117 }118 /* NAVMENU */119 #navmenubar .navmenu {120 background: url(http://hovertree.com/hvtimg/bjafjb/ay73nxk5.gif) repeat-x center top;121 height: 32px;122 padding: 0;123 margin: 0;124 float: left;125 display: inline;126 }127 128 #navmenubar .navmenu li {129 float: left;130 white-space: nowrap;131 margin: 0px;132 padding: 0px;133 display: inline;134 }135 136 #navmenubar .navmenu li a {137 background: url(http://hovertree.com/hvtimg/bjafjb/d46iuj2w.gif) no-repeat 0 0;138 width: 80px;139 padding: 7px 2px 5px 0;140 float: left;141 line-height: 20px;142 height: 20px;143 text-align: center;144 }145 146 #navmenubar .navmenu li a:hover {147 background-position: 0 -32px;148 color: #602800;149 text-decoration: none;150 padding: 8px 2px 4px 0;151 }152 153 #navmenubar .navmenu .current a, #navmenubar .navmenu .current a:hover {154 background: url(http://hovertree.com/hvtimg/bjafjb/d46iuj2w.gif) no-repeat 0 -64px;155 font-weight: 600;156 color: #FFF;157 font-size: 14px;158 padding: 7px 2px 5px 0;159 }160 161 #top #navpart .content {162 margin-top: 40px;163 margin-right: auto;164 margin-bottom: 0px;165 margin-left: auto;166 width: 900px;167 height: auto;168 color: white;169 }170 171 #top #navpart .content a {172 color: white;173 display: inline-block;174 margin-top: 0px;175 height: 30px;176 border: 0px solid white;177 line-height: 30px;178 padding: 10px;179 }180 181 .clear {182 clear: both;183 display: block;184 font: 0px/0 sans-serif;185 height: 0px;186 overflow: hidden;187 }188 </style>189 190 </head>191 <body>192 <div id="top" class="m">193 <div id="navpart">194 <div class="sideleft"></div>195 <div class="sideright"></div>196 <!--NavMenu-->197 <div id="navmenubar">198 <div class="sideleft"></div>199 <ul class="navmenu">200 <li class="current"><a href="http://hovertree.com" target="_top" title="首页">何问起</a></li>201 <li><a href="http://hovertree.com/"><span>编程资源</span></a></li>202 <li><a href="http://hovertree.com"><span>高质量源码</span></a></li>203 </ul>204 <div class="sideright"></div>205 <div class="sideleft"></div>206 <ul class="navmenu">207 <li><a href="http://tool.hovertree.com"><span>工具</span></a></li>208 <li><a href="http://hovertree.com/code/"><span>代码</span></a></li>209 <li><a href="http://keleyi.com"><span>jQuery教程</span></a></li>210 <li><a href="http://hovertree.com/tiku/"><span>在线题库</span></a></li>211 </ul>212 <div class="sideright"></div>213 <div>214 <div class="content">215 <a href="http://hovertree.com/" target="_blank">特效代码</a> <a href="http://hovertree.com/ziyuan/js/" target="_blank">JS运算符优先级</a>216 <a href="http://hovertree.com/code/texiao/ks63r6aq.htm" target="_blank">特效代码</a> <a href="http://hovertree.com/" target="_blank">特效代码</a> <a href="http://hovertree.com/" target="_blank">特效代码</a><a href="http://hovertree.com/hvtart/bjae/e4pya1x0.htm" target="_blank">.NET正则表达式</a>217 <a href="http://hovertree.com/" target="_blank">特效代码</a> <a href="keleyi.com/ziliao/googlejavascriptstyle.htm" target="_blank">谷歌JS风格</a> <a href="http://hovertree.com/" target="_blank">特效代码</a> <a href="http://hovertree.com/" target="_blank">特效代码</a> <a href="http://hovertree.com/h/bjaf/nebj8df9.htm" target="_blank">js实现异步循环</a>218 219 </div>220 </div>221 </div>222 </div>223 </div>224 <div class="clear"></div>225 </body>226 </html>227 228
网页特效:

The future of HTML will develop in a more semantic, functional and modular direction. 1) Semanticization will make the tag describe the content more clearly, improving SEO and barrier-free access. 2) Functionalization will introduce new elements and attributes to meet user needs. 3) Modularity will support component development and improve code reusability.

HTMLattributesarecrucialinwebdevelopmentforcontrollingbehavior,appearance,andfunctionality.Theyenhanceinteractivity,accessibility,andSEO.Forexample,thesrcattributeintagsimpactsSEO,whileonclickintagsaddsinteractivity.Touseattributeseffectively:1)Usese

The alt attribute is an important part of the tag in HTML and is used to provide alternative text for images. 1. When the image cannot be loaded, the text in the alt attribute will be displayed to improve the user experience. 2. Screen readers use the alt attribute to help visually impaired users understand the content of the picture. 3. Search engines index text in the alt attribute to improve the SEO ranking of web pages.

The roles of HTML, CSS and JavaScript in web development are: 1. HTML is used to build web page structure; 2. CSS is used to beautify the appearance of web pages; 3. JavaScript is used to achieve dynamic interaction. Through tags, styles and scripts, these three together build the core functions of modern web pages.

Setting the lang attributes of a tag is a key step in optimizing web accessibility and SEO. 1) Set the lang attribute in the tag, such as. 2) In multilingual content, set lang attributes for different language parts, such as. 3) Use language codes that comply with ISO639-1 standards, such as "en", "fr", "zh", etc. Correctly setting the lang attribute can improve the accessibility of web pages and search engine rankings.

HTMLattributesareessentialforenhancingwebelements'functionalityandappearance.Theyaddinformationtodefinebehavior,appearance,andinteraction,makingwebsitesinteractive,responsive,andvisuallyappealing.Attributeslikesrc,href,class,type,anddisabledtransform

TocreatealistinHTML,useforunorderedlistsandfororderedlists:1)Forunorderedlists,wrapitemsinanduseforeachitem,renderingasabulletedlist.2)Fororderedlists,useandfornumberedlists,customizablewiththetypeattributefordifferentnumberingstyles.

HTML is used to build websites with clear structure. 1) Use tags such as, and define the website structure. 2) Examples show the structure of blogs and e-commerce websites. 3) Avoid common mistakes such as incorrect label nesting. 4) Optimize performance by reducing HTTP requests and using semantic tags.


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