如何修改我当前的HTML/CSS编码，以便一旦选择了选项卡，底部边框将被删除？
以下是它目前的样子：
以下是预期的结果：
下面是代码：
<!DOCTYPE html>
<html>
<head>
<title>JavaScript tabs example</title>
<style type="text/css">
ul#tabs { list-style-type: none; margin: 30px 0 0 0; padding: 0 0 0.3em 0; }
ul#tabs li { display: inline; }
ul#tabs li a { color: #42454a; background-color: #dedbde; border: 1px solid #c9c3ba; border-bottom: none; padding: 0.3em; text-decoration: none; }
ul#tabs li a:hover { background-color: #f1f0ee; }
ul#tabs li a.selected { color: #000; background-color: #fff; font-weight: bold; }
div.tabContent { border: 1px solid #c9c3ba; padding: 0.5em; background-color: #fff; }
div.tabContent.hide { display: none; }
#file_content {
width: 100%;
border: 1px solid red;
}
#file_content td {
padding: 5px;
}
</style>
<script type="text/javascript">
var tabLinks = new Array();
var contentDivs = new Array();
function init() {
// Grab the tab links and content divs from the page
var tabListItems = document.getElementById('tabs').childNodes;
for ( var i = 0; i < tabListItems.length; i++ ) {
if ( tabListItems[i].nodeName == "LI" ) {
var tabLink = getFirstChildWithTagName( tabListItems[i], 'A' );
var id = getHash( tabLink.getAttribute('href') );
tabLinks[id] = tabLink;
contentDivs[id] = document.getElementById( id );
}
}
// Assign onclick events to the tab links, and
// highlight the first tab
var i = 0;
for ( var id in tabLinks ) {
tabLinks[id].onclick = showTab;
tabLinks[id].onfocus = function() { this.blur() };
if ( i == 0 ) tabLinks[id].className = 'selected';
i++;
}
// Hide all content divs except the first
var i = 0;
for ( var id in contentDivs ) {
if ( i != 0 ) contentDivs[id].className = 'tabContent hide';
i++;
}
}
function showTab() {
var selectedId = getHash( this.getAttribute('href') );
// Highlight the selected tab, and dim all others.
// Also show the selected content div, and hide all others.
for ( var id in contentDivs ) {
if ( id == selectedId ) {
tabLinks[id].className = 'selected';
contentDivs[id].className = 'tabContent';
} else {
tabLinks[id].className = '';
contentDivs[id].className = 'tabContent hide';
}
}
// Stop the browser following the link
return false;
}
function getFirstChildWithTagName( element, tagName ) {
for ( var i = 0; i < element.childNodes.length; i++ ) {
if ( element.childNodes[i].nodeName == tagName ) return element.childNodes[i];
}
}
function getHash( url ) {
var hashPos = url.lastIndexOf ( '#' );
return url.substring( hashPos + 1 );
}
window.onload = function() {
init()
}
</script>
</head>
<body>
<table id="file_content" cellspacing="0" cellpadding="0">
<tr><td>File Content</td></tr>
<tr>
<td>
<ul id="tabs">
<li><a href="#about">About JavaScript tabs</a></li>
<li><a href="#advantages">Advantages of tabs</a></li>
<li><a href="#usage">Using tabs</a></li>
</ul>
<div class="tabContent" id="about">
<h2>About JavaScript tabs</h2>
<div>
<p>JavaScript tabs partition your Web page content into tabbed sections. Only one section at a time is visible.</p>
<p>The code is written in such a way that the page degrades gracefully in browsers that don't support JavaScript or CSS.</p>
</div>
</div>
<div class="tabContent" id="advantages">
<h2>Advantages of tabs</h2>
<div>
<p>JavaScript tabs are great if your Web page contains a large amount of content.</p>
<p>They're also good for things like multi-step Web forms.</p>
</div>
</div>
<div class="tabContent" id="usage">
<h2>Using tabs</h2>
<div>
<p>Click a tab to view the tab's content. Using tabs couldn't be easier!</p>
</div>
</div>
</td>
</tr>
<tr>
<td></td>
</tr>
</table>
</body>
</html>
4条答案
按热度按时间d5vmydt91#
将所有选项卡设置为
position:relative和top:1px。这将使它们全部向下移动1px。给予它们都一个z-index:-1，这将使它们出现在静态内容下。将活动选项卡设置为具有z-index:1或高于0的值。这确保它位于顶部并覆盖顶部灰色边框。Working Fiddle
kx1ctssn2#
您可以向 selected 选项卡添加
border-bottom以覆盖灰色线，如下所示：*WORKING DEMO
nukf8bse3#
处理这一问题的有效方法是将边界定义为内部边界。这可以通过使用插入
box-shadow来实现。这样就不需要定义负边距或相对偏移来掩盖边界，因为它是内部边界。t2a7ltrp4#
在你的文件里第11行