Question

我有一个网站上有一个css菜单。正在显示下拉项目，但只要您尝试单击该项目，下拉菜单就会关闭。导航工作在JSFiddle上 jsFiddle example

但是它在本地或部署时不起作用。 Deployed version

菜单html如下所示:(部分页面）

<div>
    <ul id="menu">

        <li><a href="/">Home</a></li>
        <li class="menu dropdown"><a href="#" class="drop">Testing</a>  
        <div class="dropdown_1column">        
            <div class="col_1">                
                <ul class="simple">
                    <li><a href="/testing/">Overview</a></li>

                </ul>   
            </div>
        </div>
        </li>
        <li><a href="#">Accreditation</a></li>
        <li><a href="#">Reports</a></li>

        <li class="menu_right"><a href="#">Login</a></li>

        <li class="menu_right dropdown" ><a href="#" class="drop">About</a>  
            <div class="dropdown_1column align_right">        
                <div class="col_1">                
                    <ul class="simple">
                        <li><a href="#">Our Standards</a></li>
                        <li><a href="#">Our Management</a></li>
                        <li><a href="#">Our Scientists</a></li>
                        <li><a href="#">Our Sponsosrs</a></li>
                    </ul>   
                </div>
            </div>
        </li>
    </ul>
</div>

并且css看起来像这样：

body, ul, li {
    font-size:14px; 
    font-family:Arial, Helvetica, sans-serif;
    line-height:21px;
    text-align:left;
}

#menu {
    list-style:none;
  /*  width:940px; */
    margin:3px auto 0px auto;
    height:43px;
    padding:0px 2px 0px 20px;

    /* Rounded Corners */

    -moz-border-radius: 10px;
    -webkit-border-radius: 10px;
    border-radius: 10px;

    /* Background color and gradients */

    background: #014464;
    background: -moz-linear-gradient(top, #0272a7, #013953);
    background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#0272a7), to(#013953));

    /* Borders */

    border: 1px solid #002232;

    -moz-box-shadow:inset 0px 0px 1px #edf9ff;
    -webkit-box-shadow:inset 0px 0px 1px #edf9ff;
    box-shadow:inset 0px 0px 1px #edf9ff;
}

#menu li {
    float:left;
    display:block;
    text-align:center;
    position:relative;
    padding: 4px 10px 4px 10px;
    margin-right:30px;
    margin-top:7px;
    border:none;
}

#menu li.dropdown:hover {
    border: 1px solid #777777;
    padding: 4px 9px 4px 9px;

    /* Background color and gradients */

    background: #F4F4F4;
    background: -moz-linear-gradient(top, #F4F4F4, #EEEEEE);
    background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#F4F4F4), to(#EEEEEE));

    /* Rounded corners */

    -moz-border-radius: 5px 5px 0px 0px;
    -webkit-border-radius: 5px 5px 0px 0px;
    border-radius: 5px 5px 0px 0px;
}

#menu li a {
    font-family:Arial, Helvetica, sans-serif;
    font-size:14px; 
    color: #EEEEEE;
    display:block;
    outline:0;
    text-decoration:none;
    text-shadow: 2px 2px 2px #000;
}

#menu li:hover a {
    font-family:Arial, Helvetica, sans-serif;
    font-size:14px; 
    color: #000;
    display:block;
    outline:0;
    text-decoration:none;
    text-shadow: 2px 2px 2px #AAF;
}

#menu li.dropdown:hover a {
    color:#161616;
    text-shadow: 1px 1px 1px #ffffff;
}
#menu li .drop {
    padding-right:21px;
    background:url("/img/drop.png") no-repeat right 8px;
}
#menu li:hover .drop {
    background:url("/img/drop.png") no-repeat right 7px;
}

.dropdown_1column, 
.dropdown_2columns, 
.dropdown_3columns, 
.dropdown_4columns,
.dropdown_5columns {
    margin:4px auto;
    float:left;
    position:absolute;
    left:-999em; /* Hides the drop down */
    text-align:left;
    padding:10px 5px 10px 5px;
    border:1px solid #777777;
    border-top:none;

    /* Gradient background */
    background:#F4F4F4;
    background: -moz-linear-gradient(top, #EEEEEE, #BBBBBB);
    background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#EEEEEE), to(#BBBBBB));

    /* Rounded Corners */
    -moz-border-radius: 0px 5px 5px 5px;
    -webkit-border-radius: 0px 5px 5px 5px;
    border-radius: 0px 5px 5px 5px;
}

.dropdown_1column {width: 140px;}
.dropdown_2columns {width: 280px;}
.dropdown_3columns {width: 420px;}
.dropdown_4columns {width: 560px;}
.dropdown_5columns {width: 700px;}

#menu li:hover .dropdown_1column, 
#menu li:hover .dropdown_2columns, 
#menu li:hover .dropdown_3columns,
#menu li:hover .dropdown_4columns,
#menu li:hover .dropdown_5columns {
    left:-1px;
    top:auto;
}

.col_1,
.col_2,
.col_3,
.col_4,
.col_5 {
    display:inline;
    float: left;
    position: relative;
    margin-left: 5px;
    margin-right: 5px;
}
.col_1 {width:130px;}
.col_2 {width:270px;}
.col_3 {width:410px;}
.col_4 {width:550px;}
.col_5 {width:690px;}

#menu .menu_right {
    float:right;
    margin-right:0px;
}
#menu li .align_right {
    /* Rounded Corners */
    -moz-border-radius: 5px 0px 5px 5px;
    -webkit-border-radius: 5px 0px 5px 5px;
    border-radius: 5px 0px 5px 5px;
}

#menu li:hover .align_right {
    left:auto;
    right:-1px;
    top:auto;
}

#menu p, #menu h2, #menu h3, #menu ul li {
    font-family:Arial, Helvetica, sans-serif;
    line-height:21px;
    font-size:12px;
    text-align:left;
    text-shadow: 1px 1px 1px #FFFFFF;
}
#menu h2 {
    font-size:21px;
    font-weight:400;
    letter-spacing:-1px;
    margin:7px 0 14px 0;
    padding-bottom:14px;
    border-bottom:1px solid #666666;
}
#menu h3 {
    font-size:14px;
    margin:7px 0 14px 0;
    padding-bottom:7px;
    border-bottom:1px solid #888888;
}
#menu p {
    line-height:18px;
    margin:0 0 10px 0;
}

#menu li:hover div a {
    font-size:12px;
    color:#015b86;
}
#menu li:hover div a:hover {
    color:#029feb;
}


.strong {
    font-weight:bold;
}
.italic {
    font-style:italic;
}

.imgshadow { /* Better style on light background */
    background:#FFFFFF;
    padding:4px;
    border:1px solid #777777;
    margin-top:5px;
    -moz-box-shadow:0px 0px 5px #666666;
    -webkit-box-shadow:0px 0px 5px #666666;
    box-shadow:0px 0px 5px #666666;
}
.img_left { /* Image sticks to the left */
    width:auto;
    float:left;
    margin:5px 15px 5px 5px;
}

#menu li .black_box {
    background-color:#333333;
    color: #eeeeee;
    text-shadow: 1px 1px 1px #000;
    padding:4px 6px 4px 6px;

    /* Rounded Corners */
    -moz-border-radius: 5px;
    -webkit-border-radius: 5px;
    border-radius: 5px;

    /* Shadow */
    -webkit-box-shadow:inset 0 0 3px #000000;
    -moz-box-shadow:inset 0 0 3px #000000;
    box-shadow:inset 0 0 3px #000000;
}

#menu li ul {
    list-style:none;
    padding:0;
    margin:0 0 12px 0;
}
#menu li ul li {
    font-size:12px;
    line-height:24px;
    position:relative;
    text-shadow: 1px 1px 1px #ffffff;
    padding:0;
    margin:0;
    float:none;
    text-align:left;
    width:130px;
}
#menu li ul li:hover {
    background:none;
    border:none;
    padding:0;
    margin:0;
}

#menu li .greybox li {
    background:#F4F4F4;
    border:1px solid #bbbbbb;
    margin:0px 0px 4px 0px;
    padding:4px 6px 4px 6px;
    width:116px;

    /* Rounded Corners */
    -moz-border-radius: 5px;
    -webkit-border-radius: 5px;
    -khtml-border-radius: 5px;
    border-radius: 5px;
}
#menu li .greybox li:hover {
    background:#ffffff;
    border:1px solid #aaaaaa;
    padding:4px 6px 4px 6px;
    margin:0px 0px 4px 0px;
}

菜单不依赖于JQuery或任何其他脚本。

Answer 1

根据Akshay的建议，我在您的网站上添加了以下风格。

.dropdown {z-index：100; }

似乎解决了这个问题。如您所见，下拉菜单突出显示，持久存储在鼠标指针下方。

z-index of 100 solves the problem

Answer 2

我确实认为这种情况正在发生，因为您的标题'计算机犯罪服务实验室'正在覆盖下拉列表，因此您将徘徊在标题上而不是下拉列表，这就是下拉菜单消失的原因让下拉菜单更高z-索引值如果定位它会帮助你

css不在本地工作或在远程网站上工作 - 但是在jsfiddle工作？

2 个答案: