position属性取值为fixed时,则元素的位置将不受滚动条的影响,而是直接依据窗口定位,这就是将表头固定的最直接方法,网上其他途径感觉都是在走弯路。但是与此同时必须解决两个问题。第一:表体将随之不依据表头定位,而是依据body元素定位,因此表体将上移,导致表体靠上部分被表头遮挡,而且有重影。第二:表体的宽高和表头的宽高也将互相独立不再受文档流的约束,这导致单元格对不齐。 解决办法示例如下。其中,单元格上下对齐的问题可以通过设置padding margin 百分比width来解决,表头和表体也可以放在各自的div里。 样式单 <style type="text/css"> *{ padding:0px; margin: 0px; } #thead { /*固定表头*/ position:fixed; /* 表头显示层次高于表体,防止空白行和表头重合时出现重影*/ z-index:2; background:#ECECFF; } #spacetr{ /* 空白的tr 用来填补表头遮盖的数据*/ position:relative; z-index:1; } .tdata { /* 显示表格数据的tr */ position:relative; z-index:1; } </style> js脚本 $(function(){ $("#spacetr").css("height",$("#thead").css("height")); //将空白行的高度设置为和表头等高,使被遮挡的数据刚好下移表头高度的距离 }); jsp代码: <div style="width:100%"> <%--<img src="/static/imghwm/default1.png" data-src="${pageContext.request.contextPath}/images/post_head.jpg" class="lazy"/ alt="html css 如何将表头固定_html/css_WEB-ITnose" > --%> <table id="table" border="1px gray solid " cellspacing="0" cellpadding="0" width="100%;" > <tr id="thead"> <td width="9%" align="center">招聘学科</td> <c:forEach items="${postnames}" var="postname"> <td valign="bottom" align="center"> ${postname} </td> </c:forEach> </tr> <tr id="spacetr"> <td width="9%"></td> <c:forEach items="${postnames}" var="postname"> <td> </td> </c:forEach> </tr> <c:forEach items="${shcoolsPostnumbers}" var="schoolPostnumbers"> <tr class="tdata"> <td width="9%" >${schoolPostnumbers.key}</td> <c:forEach items="${schoolPostnumbers.value}" var="postnumber"> <td align="center"> ${postnumber} </td> </c:forEach> </tr> </c:forEach> </table> </div>

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

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


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

SublimeText3 Chinese version
Chinese version, very easy to use
