


<div class="userinfo2 pr"> <div class="ib"> <a href="<?php echo $cfg_memberurl; ?>/index.php"><img class="radius-circle lazy" src="/static/imghwm/default1.png" data-src="<?php echo $facepic;? alt="css hover: display:block;伪类在下拉菜单中的应用需要注意z-index的使用_html/css_WEB-ITnose" >" width="42" style="max-width:90%" /></a> </div> <div class="welcome"><strong><?php echo $cfg_ml->M_UserName; ?></strong></div> <div class="mylink2 pa top40 left0 "> <ul> <li><a href="<?php echo $cfg_memberurl; ?>/index.php">会员中心</a></li> <li><a href="<?php echo $myurl;?>">我的空间</a></li> <li><a href="<?php echo $cfg_memberurl; ?>/guestbook_admin.php">我的留言</a></li> <li><a href="<?php echo $cfg_memberurl; ?>/mystow.php">我的收藏</a></li> <li><a href="<?php echo $cfg_memberurl; ?>/article_add.php">发表文章</a></li> <li><a href="<?php echo $cfg_memberurl; ?>/myfriend.php">好友管理</a></li> <li><a href="<?php echo $cfg_memberurl; ?>/visit-history.php">访客记录</a></li> <li><a href="<?php echo $cfg_memberurl; ?>/search.php">查找好友</a></li> <li> <a href="<?php echo $cfg_memberurl; ?>/index_do.php?fmdo=login&dopost=exit">退出登录</a> </li> </ul> </div></div>
css:
.pr{position:relative;}
.pa{position:absolute;}
.userinfo2 .mylink2{z-index:1;display:none;width:80px;background:#fff;}
.userinfo2:hover .mylink2{display:block;}
以上用法,注意增加z-index这一句,否则,下拉菜单在遇到导航或其它元素时,可能会闪烁或意外隐藏等.

The usage methods of HTML tags and attributes include: 1. Basic usage: Use tags such as and, and add necessary information through attributes such as src and href. 2. Advanced usage: Use data-* custom attributes to achieve complex interactions. 3. Avoid common mistakes: Make sure the property values are surrounded by quotes. 4. Performance optimization: Keep it simple, use standard attributes and CSS class names to ensure that the image has alt attributes. Mastering these will improve web development skills.

HTMLtagsdefinethestructureofawebpage,whileattributesaddfunctionalityanddetails.1)Tagslike,,andoutlinethecontent'splacement.2)Attributessuchassrc,class,andstyleenhancetagsbyspecifyingimagesources,styling,andmore,improvingfunctionalityandappearance.

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


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