我正在设计一个新的网站布局,但遇到了问题。
我点击一个菜单,触发一些 Javascript 来显示一个菜单容器。这出现使用 jquery 切换功能。它出现一秒钟,然后当它完成时,div 隐藏在我的主要内容 div 后面,所以你看不到它。
我已将子菜单容器上的 z-index 更改为 999,但没有任何区别。
如果您单击主页按钮(在下面的代码中或在 JSFiddle 链接中),您应该明白我的意思。
html,
body {
font-family: arial;
margin: 0;
padding: 0;
}
h1 {
font-size: x-large;
font-weight: bold;
color: #403537;
}
header {
margin-left: auto;
margin-right: auto;
text-align: center;
font-size: xx-large;
font-weight: bold;
vertical-align: central;
background-color: #403537;
}
#container {
width: 1024px;
margin-left: auto;
margin-right: auto;
background-color: #E5E2E4;
border: #BFBDBE solid thin;
border-radius: 5px;
margin-top: 10px;
margin-bottom: 10px;
padding: 10px;
}
form.loginForm {
width: 500px;
margin-left: auto;
margin-right: auto;
background-color: #E5E2E4;
border: #BFBDBE solid thin;
border-radius: 5px;
margin-top: 40px;
margin-bottom: 10px;
padding: 10px;
clear: both;
white-space: normal;
}
input[type=text],
input[type=password] {
padding: 10px;
border: 1px solid #ccc;
border-radius: 5px;
transition: border linear .2s, box-shadow linear .2s;
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
width: 360px;
margin-top: 10px;
margin-bottom: 10px;
outline: none;
}
input[type=text]:required:focus,
input[type=password]:required:focus {
box-shadow: 4px 4px 5px rgba(200, 0, 0, 0.40);
outline: none;
}
input[type=text]:valid:focus,
input[type=password]:valid:focus {
box-shadow: 4px 4px 5px rgba(27, 127, 18, 0.40);
outline: none;
}
input[type=submit] {
width: 120px;
padding: 10px;
color: white;
background: #3239ff;
/* Old browsers */
background: -moz-linear-gradient(top, #3239ff 1%, #0d1cc1 100%);
/* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(1%, #3239ff), color-stop(100%, #0d1cc1));
/* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #3239ff 1%, #0d1cc1 100%);
/* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #3239ff 1%, #0d1cc1 100%);
/* Opera 11.10+ */
background: -ms-linear-gradient(top, #3239ff 1%, #0d1cc1 100%);
/* IE10+ */
background: linear-gradient(to bottom, #3239ff 1%, #0d1cc1 100%);
/* W3C */
filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#3239ff', endColorstr='#0d1cc1', GradientType=0);
border-radius: 5px;
border: black solid thin;
font-size: medium;
text-shadow: 2px 2px 1px rgba(0, 0, 0, 1);
}
label {
width: 100px;
margin-right: 10px;
text-align: right;
}
#pageTitle {
width: 800px;
border-bottom: #BFBDBE solid thin;
margin-left: auto;
margin-right: auto;
}
footer {
color: #BFBDBE;
text-align: center;
font-size: small;
margin-top: 50px;
}
footer a {
color: #BFBDBE;
text-decoration: none;
}
footer a:hover {
text-decoration: underline;
}
#errorToolbox {
position: absolute;
width: auto;
height: auto;
border-radius: 5px;
display: none;
padding: 8px;
background-color: #403537;
z-index: 9999;
color: white;
box-shadow: 4px 4px 5px rgba(0, 0, 0, 0.40);
}
nav {
background: #403537;
/* Old browsers */
background: -moz-linear-gradient(top, #403537 0%, #665459 100%);
/* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #403537), color-stop(100%, #665459));
/* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #403537 0%, #665459 100%);
/* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #403537 0%, #665459 100%);
/* Opera 11.10+ */
background: -ms-linear-gradient(top, #403537 0%, #665459 100%);
/* IE10+ */
background: linear-gradient(to bottom, #403537 0%, #665459 100%);
/* W3C */
filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#403537', endColorstr='#665459', GradientType=0);
height: 40px;
}
.menu {
width: 1024px;
margin-left: auto;
margin-right: auto;
height: calc(100% - 20px);
padding: 10px;
}
a.menuHeaderButton {
width: 100px;
margin-left: 1px;
margin-right: 1px;
height: 100%;
float: left;
font-weight: bold;
color: white;
text-shadow: 4px 4px 7px rgba(117, 110, 110, 1);
text-decoration: none;
}
.subMenuContainer {
background-color: #403537;
width: 150px;
padding-top: 10px;
padding-bottom: 10px;
clear: both;
display: none;
z-index: 999;
}
.menuItem {
clear: both;
display: block;
margin-left: 5px;
margin-right: 5px;
padding-top: 8px;
padding-bottom: 8px;
border-bottom: #BFBDBE solid thin;
padding-left: 4px;
transition: all linear .2s, box-shadow linear .2s;
z-index: 999;
}
.menuItem:hover {
background-color: #BFBDBE;
}
a.menuItem {
text-decoration: none;
color: white;
z-index: 999;
}<!DOCTYPE html>
<html>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script>
function clickHeader(headerName) {
//Get the position of the header menu
var position = $("#header" + headerName).position();
//alert("Left: " + position.left);
$(".subMenuContainer").hide();
$("#" + headerName).css({
"margin-left": position.left
})
$("#" + headerName).toggle("medium");
}
</script>
<header>
<div style="width: 1024px; margin-left: auto; margin-right: auto;"></div>
</header>
<nav>
<div class="menu"> <a class="menuHeaderButton" id="headerHome" href="javascript:clickHeader('Home');">Home</a>
<a class="menuHeaderButton" id="headerBlog" href="javascript:clickHeader('Blog');">Blog</a>
<a class="menuHeaderButton" id="headerCritiMon" href="#">CritiMon</a>
</div>
<div class="subMenuContainer" id="Home"> <a class="menuItem" href="#">Item 1</a>
<a class="menuItem" href="#">Item 2</a>
</div>
<div class="subMenuContainer" id="Blog"> <a class="menuItem" href="#">Item 3</a>
<a class="menuItem" href="#">Item 4</a>
</div>
</nav>
<div id="container">
<p>Hello, the quick brown fox jumped over the lazy dogs back.</p>
<p>All good men must come to the aid of the party.</p>
</div>
<footer>© 2010 - 2015 | <a href="#">Privacy Policy</a>
</footer>
</body>
</html>
最佳答案
您在 .subMenuContainer 上忘记了 position: absolute;。 z-index 不影响静态定位的元素。
For a positioned box, the 'z-index' property specifies:
- The stack level of the box in the current stacking context.
- Whether the box establishes a stacking context.
(强调我的)
.subMenuContainer {
background-color: #403537;
<b><i>position: absolute;</i></b>
width: 150px;
padding-top: 10px;
padding-bottom: 10px;
clear: both;
display: none;
z-index: 999;
}
html,
body {
font-family: arial;
margin: 0;
padding: 0;
}
h1 {
font-size: x-large;
font-weight: bold;
color: #403537;
}
header {
margin-left: auto;
margin-right: auto;
text-align: center;
font-size: xx-large;
font-weight: bold;
vertical-align: central;
background-color: #403537;
}
#container {
width: 1024px;
margin-left: auto;
margin-right: auto;
background-color: #E5E2E4;
border: #BFBDBE solid thin;
border-radius: 5px;
margin-top: 10px;
margin-bottom: 10px;
padding: 10px;
}
form.loginForm {
width: 500px;
margin-left: auto;
margin-right: auto;
background-color: #E5E2E4;
border: #BFBDBE solid thin;
border-radius: 5px;
margin-top: 40px;
margin-bottom: 10px;
padding: 10px;
clear: both;
white-space: normal;
}
input[type=text],
input[type=password] {
padding: 10px;
border: 1px solid #ccc;
border-radius: 5px;
transition: border linear .2s, box-shadow linear .2s;
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
width: 360px;
margin-top: 10px;
margin-bottom: 10px;
outline: none;
}
input[type=text]:required:focus,
input[type=password]:required:focus {
box-shadow: 4px 4px 5px rgba(200, 0, 0, 0.40);
outline: none;
}
input[type=text]:valid:focus,
input[type=password]:valid:focus {
box-shadow: 4px 4px 5px rgba(27, 127, 18, 0.40);
outline: none;
}
input[type=submit] {
width: 120px;
padding: 10px;
color: white;
background: #3239ff;
/* Old browsers */
background: -moz-linear-gradient(top, #3239ff 1%, #0d1cc1 100%);
/* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(1%, #3239ff), color-stop(100%, #0d1cc1));
/* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #3239ff 1%, #0d1cc1 100%);
/* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #3239ff 1%, #0d1cc1 100%);
/* Opera 11.10+ */
background: -ms-linear-gradient(top, #3239ff 1%, #0d1cc1 100%);
/* IE10+ */
background: linear-gradient(to bottom, #3239ff 1%, #0d1cc1 100%);
/* W3C */
filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#3239ff', endColorstr='#0d1cc1', GradientType=0);
border-radius: 5px;
border: black solid thin;
font-size: medium;
text-shadow: 2px 2px 1px rgba(0, 0, 0, 1);
}
label {
width: 100px;
margin-right: 10px;
text-align: right;
}
#pageTitle {
width: 800px;
border-bottom: #BFBDBE solid thin;
margin-left: auto;
margin-right: auto;
}
footer {
color: #BFBDBE;
text-align: center;
font-size: small;
margin-top: 50px;
}
footer a {
color: #BFBDBE;
text-decoration: none;
}
footer a:hover {
text-decoration: underline;
}
#errorToolbox {
position: absolute;
width: auto;
height: auto;
border-radius: 5px;
display: none;
padding: 8px;
background-color: #403537;
z-index: 9999;
color: white;
box-shadow: 4px 4px 5px rgba(0, 0, 0, 0.40);
}
nav {
background: #403537;
/* Old browsers */
background: -moz-linear-gradient(top, #403537 0%, #665459 100%);
/* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #403537), color-stop(100%, #665459));
/* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #403537 0%, #665459 100%);
/* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #403537 0%, #665459 100%);
/* Opera 11.10+ */
background: -ms-linear-gradient(top, #403537 0%, #665459 100%);
/* IE10+ */
background: linear-gradient(to bottom, #403537 0%, #665459 100%);
/* W3C */
filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#403537', endColorstr='#665459', GradientType=0);
height: 40px;
}
.menu {
width: 1024px;
margin-left: auto;
margin-right: auto;
height: calc(100% - 20px);
padding: 10px;
}
a.menuHeaderButton {
width: 100px;
margin-left: 1px;
margin-right: 1px;
height: 100%;
float: left;
font-weight: bold;
color: white;
text-shadow: 4px 4px 7px rgba(117, 110, 110, 1);
text-decoration: none;
}
.subMenuContainer {
background-color: #403537;
position: absolute;
width: 150px;
padding-top: 10px;
padding-bottom: 10px;
clear: both;
display: none;
z-index: 999;
}
.menuItem {
clear: both;
display: block;
margin-left: 5px;
margin-right: 5px;
padding-top: 8px;
padding-bottom: 8px;
border-bottom: #BFBDBE solid thin;
padding-left: 4px;
transition: all linear .2s, box-shadow linear .2s;
z-index: 999;
}
.menuItem:hover {
background-color: #BFBDBE;
}
a.menuItem {
text-decoration: none;
color: white;
z-index: 999;
}<!DOCTYPE html>
<html>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script>
function clickHeader(headerName) {
//Get the position of the header menu
var position = $("#header" + headerName).position();
//alert("Left: " + position.left);
$(".subMenuContainer").hide();
$("#" + headerName).css({
"margin-left": position.left
})
$("#" + headerName).toggle("medium");
}
</script>
<header>
<div style="width: 1024px; margin-left: auto; margin-right: auto;"></div>
</header>
<nav>
<div class="menu"> <a class="menuHeaderButton" id="headerHome" href="javascript:clickHeader('Home');">Home</a>
<a class="menuHeaderButton" id="headerBlog" href="javascript:clickHeader('Blog');">Blog</a>
<a class="menuHeaderButton" id="headerCritiMon" href="#">CritiMon</a>
</div>
<div class="subMenuContainer" id="Home"> <a class="menuItem" href="#">Item 1</a>
<a class="menuItem" href="#">Item 2</a>
</div>
<div class="subMenuContainer" id="Blog"> <a class="menuItem" href="#">Item 3</a>
<a class="menuItem" href="#">Item 4</a>
</div>
</nav>
<div id="container">
<p>Hello, the quick brown fox jumped over the lazy dogs back.</p>
<p>All good men must come to the aid of the party.</p>
</div>
<footer>© 2010 - 2015 | <a href="#">Privacy Policy</a>
</footer>
</body>
</html>
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