悬停时看起来不错，但是如果您将光标向下移动一点点或移动到实际的下拉黑框上，悬停就会消失。我遇到了一些障碍，需要一些帮助。
索引.html
<!doctype html>
<head>
<link rel="stylesheet" type="text/css" href="style2.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript" src="main.js"></script>
</head>
<nav>
<ul id="headNav">
<li id="item1" class="mega">
<h2> <a href="" class="hover">Item 1</a></h2>
<div id="item1" class="dropdown gradbackground">Sub-Item 1</div>
</li>
<li id="item2" class="mega">
<h2> <a href="" class="hover">Item 2</a></h2>
<div id="item2" class="dropdown gradbackground">Sub-Item 2</div>
</li>
</ul>
<div class="clear"></div>
</nav>
</body>
</html>
CSS
a {color:#fff;}
/* Mega Menu*/
ul#headNav
{
width: 100%;
height: 40px;
margin: 16px 0 10px 0;
padding: 0;
list-style: none;
background: #484848; /* Old browsers */
/* IE9 SVG, needs conditional override of 'filter' to 'none' */
background: url(data:image/svg+xml;base64,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);
background: -moz-linear-gradient(top, #484848 0%, #313030 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#484848), color-stop(100%,#313030)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #484848 0%,#313030 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #484848 0%,#313030 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #484848 0%,#313030 100%); /* IE10+ */
background: linear-gradient(to bottom, #484848 0%,#313030 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#484848', endColorstr='#313030',GradientType=0 ); /* IE6-8 */
border-radius: 4px;
border: 1px solid #3B3B3B;
}
ul#headNav li {
height: 39px;
position: relative;
float: left;
padding: 0px 8px;
border-right: 1px solid #565656;
}
ul#headNav li a {
width: 126px;
height: 40px;
position: relative;
top: -10px;
display: block;
line-height: 60px;
text-align: center;
background: url(../img/nav/home.png) no-repeat 0 0;
z-index: 10;
}
ul#headNav li .hover:hover, ul#headNav li a:hover {
height: 60px;
background: #474747;
border-radius: 5px 5px 0px 0px;
}
ul#headNav li:nth-of-type(8n) {border-right:none;}
li#recording a.hover
{
line-height: 18px;
top: 2px;
}
ul#headNav li a {
width: 101px;
background: url(../img/nav/home.png) no-repeat 0 0;
}
a#BuyNow { line-height: 38px;}
a#BuyNow:hover { text-decoration:underline; color:#fff!important;}
#quicksearch
{
position: relative;
float: left;
margin-right: 44px;
}
nav h2
{
text-transform:capitalize;
font-size:13px !important;
color:#000000;
font-weight:bold;
margin:0;
padding:0 0px;
line-height:28px !important;
height:0px;
}
a.liLink {background:none !important; border:none ;}
/* End Mega Menu */
.dropdown
{
display: none;
width:570px;
position: absolute;
top:23px;
padding:10px;
height:auto;
min-height:400px;
color: #ffffff;
-webkit-box-shadow: 0px 4px 4px rgba(0,0,0,0.3);
-moz-box-shadow: 0px 4px 4px rgba(0,0,0,0.3);
box-shadow:0px 4px 4px rgba(0,0,0,0.3);
z-index:99;
font-weight:bold;
z-index:999999;
border-top:16px solid #474747;
background:#000;
}
.regtable
{
margin:20px 0px 0px 30px;
}
#item1.dropdown {top: 50px; left: 8px; }
#item2.dropdown {left: 8px; top: 50px; }
ul.megacatlist li ul li, ul.megabrandlist li ul li
{
display:block !important;
position: relative !important;
float:none !important;
line-height:16px !important;
border:none !important;
padding:0 !important;
margin:0px 0 1px 0 !important;
text-transform:none !important;
height:20px;
}
ul.megacatlist li ul li a, ul.megabrandlist li ul li a
{
color: #666666 !important;
text-decoration:none;
font-size:12px;
line-height:16px !important;
padding:1px 5px 0px 5px !important;
border:none;
width:auto;
display:block;
height:100%;
text-transform:none !important;
}
ul.megacatlist li ul li a:hover, ul.megabrandlist li ul li a:hover
{
text-decoration:underline !important;
border:none !important;
}
.topNavSection a{color:#ffffff;}
.topNavSection h3{padding:5px;border:none; text-decoration:underline;}
.dropdown a, .dropdown ul li ul li {
color: #4D4D4D;
font-size: 14px !important;
padding: 0px 0px 0px 5px;
position: relative;
text-decoration: none;
text-transform: none !important;
display:block;
width: 100%;
height: 100%;
line-height: 30px;
}
.dropdown a:hover, .dropdown ul li ul li:hover
{
margin:0px;
padding-left:5px;
text-decoration:underline;
display:block;
}
#topnav ul {
display: block;
list-style: none outside none;
margin: 0;
padding: 0;
position: relative;
width: 100%;
}
.dropdown ul li ul {
margin-right: 0 !important;
}
#topnav ul li {
font-size: 16px;
margin-right: 51px;
}
#topnav ul li {
display: block;
float: left;
font-size: 14px;
margin: 0 35px 0 0;
padding: 2px 5px;
text-transform: uppercase;
width: auto;
}
.dropdown ul li ul li {
display: block !important;
float: none !important;
margin-right: 0 !important;
}
.dropdown ul li {
display: block;
float: left !important;
margin-left: 0 !important;
margin-right: 15px !important;
max-width: 226px !important;
padding-left: 0 !important;
position: relative;
text-align: left;
width: auto !important;
border: medium none !important;
}
.dropdown ul li:nth-of-type(2n)
{
margin:0px;
}
/*end mega menu*/
JS
/* start megamenu script */
function slideSubDown() {
$(".mega").children('.dropdown').slideUp("fast");
$(this).children('.dropdown').slideDown({
speed: 1600,
easing: "swing"
})
//$(this).children('a').addClass("pointer");
}
function slideSubUp() {
$(".mega").children('.dropdown').slideUp("250");
//$(this).children('a').removeClass("pointer");
}
$(".mega").hoverIntent(slideSubDown, slideSubUp);
/*end megamenu script */