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我创建了一个简单的jQuery下拉菜单。使用FF，Chrome，ie9。但是，它在ie兼容模式下不起作用。jQuery下拉菜单ie9兼容模式
HTML：
<div class="navBarCont">
<ul class="navBar gradient shadow" id="navBar">
<li><a href="index.html">Home</a></li>
<li class="selected"><a href="about_us.html">About Us</a></li>
<li><a href="faq.html">FAQs</a></li>
<li>Upcoming Events/News</li>
<li>Educational
<ul class="subnav">
<li><a href="osteooftheknee.html">Osteoarthritis of the Knee</a></li>
<li><a href="benefitsofexercise.html">Benefits of Exercise</a></li>
<li><a href="didyouknow.html">Did You Know?</a></li>
</ul>
</li>
<li><a href="contact.html">Contact Us</a></li>
</ul>
</div>
JS：
$(document).ready(function(){
$('.navBar li').hover(function() {
$('ul', this).stop().slideDown(100);
}, function() {
$('ul', this).stop().slideUp(100);
});
});
CSS：
.navBarCont {
position: relative;
top: -15px;
z-index: auto;
width: 714px;
margin: 0 auto;
background:#fff;
}
.navBar {
cursor: pointer;
z-index: 95;
position:relative;
height: 28px;
float: left;
color: #ffffff;
font-family: arial;
font-size: .97em;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
background: #fff;
}
.navBar>li {
float: left;
display: block;
height:23px;
border-right: thin solid #ffffff;
padding: 5px 18px 0;
position: relative;
background: rgb(109,179,242); /* 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, rgba(109,179,242,1) 0%, rgba(84,163,238,1) 50%, rgba(54,144,240,1) 51%, rgba(30,105,222,1) 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, rgba(109,179,242,1)), color-stop(50%, rgba(84,163,238,1)), color-stop(51%, rgba(54,144,240,1)), color-stop(100%, rgba(30,105,222,1))); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, rgba(109,179,242,1) 0%, rgba(84,163,238,1) 50%, rgba(54,144,240,1) 51%, rgba(30,105,222,1) 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, rgba(109,179,242,1) 0%, rgba(84,163,238,1) 50%, rgba(54,144,240,1) 51%, rgba(30,105,222,1) 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, rgba(109,179,242,1) 0%, rgba(84,163,238,1) 50%, rgba(54,144,240,1) 51%, rgba(30,105,222,1) 100%); /* IE10+ */
background: linear-gradient(top, rgba(109,179,242,1) 0%, rgba(84,163,238,1) 50%, rgba(54,144,240,1) 51%, rgba(30,105,222,1) 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#6db3f2', endColorstr='#1e69de', GradientType=0); /* IE6-8 */
text-align: center;
}
.navBar li:hover, .arthritis .title a:hover {
background: #a5cdef; /* Old browsers */
background: -moz-linear-gradient(top, #a5cdef 0%, #4e8edb 50%, #337add 51%, #163a9e 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#a5cdef), color-stop(50%,#4e8edb), color-stop(51%,#337add), color-stop(100%,#163a9e)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #a5cdef 0%,#4e8edb 50%,#337add 51%,#163a9e 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #a5cdef 0%,#4e8edb 50%,#337add 51%,#163a9e 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #a5cdef 0%,#4e8edb 50%,#337add 51%,#163a9e 100%); /* IE10+ */
background: linear-gradient(to bottom, #a5cdef 0%,#4e8edb 50%,#337add 51%,#163a9e 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#a5cdef', endColorstr='#163a9e',GradientType=0); /* IE6-9 */
}
.navBar li.selected>a,
.navBar li.selected{
color: #ffffb9;
}
.navBar li.selected {
background: #a5cdef; /* Old browsers */
background: -moz-linear-gradient(top, #a5cdef 0%, #4e8edb 50%, #337add 51%, #163a9e 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#a5cdef), color-stop(50%,#4e8edb), color-stop(51%,#337add), color-stop(100%,#163a9e)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #a5cdef 0%,#4e8edb 50%,#337add 51%,#163a9e 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #a5cdef 0%,#4e8edb 50%,#337add 51%,#163a9e 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #a5cdef 0%,#4e8edb 50%,#337add 51%,#163a9e 100%); /* IE10+ */
background: linear-gradient(to bottom, #a5cdef 0%,#4e8edb 50%,#337add 51%,#163a9e 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#a5cdef', endColorstr='#163a9e',GradientType=0); /* IE6-9 */
}
.navBar>li:last-child {
border-right: none;
-webkit-border-radius: 0 5px 5px 0;
-moz-border-radius: 0 5px 5px 0;
border-radius: 0 5px 5px 0;
}
.navBar>li:first-child {
-webkit-border-radius: 5px 0 0 5px;
-moz-border-radius: 5px 0 0 5px;
border-radius: 5px 0 0 5px;
}
.navBar ul {
position: absolute;
left: 0;
text-decoration: none;
list-style: none;
display: none;
padding: 10px;
text-align: left;
border-top: none;
z-index: 90;
top: 28px;
color: #fff;
-moz-border-radius-topleft: 0px;
-moz-border-radius-topright: 0px;
-moz-border-radius-bottomright: 5px;
-moz-border-radius-bottomleft: 5px;
-webkit-border-radius: 0px 0px 5px 5px;
border-radius: 0px 0px 5px 5px;
background: #6db3f2; /* Old browsers */
background: -moz-linear-gradient(top, #6db3f2 0%, #1e69de 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#6db3f2), color-stop(100%,#1e69de)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #6db3f2 0%,#1e69de 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #6db3f2 0%,#1e69de 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #6db3f2 0%,#1e69de 100%); /* IE10+ */
background: linear-gradient(to bottom, #6db3f2 0%,#1e69de 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#6db3f2', endColorstr='#1e69de',GradientType=0); /* IE6-9 */
}
.navBar a {
color: #fff;
text-decoration: none;
}
.navBar ul li {
clear: both;
float: left;
padding: 5px;
border-right: none;
}
.navBar ul li a {
color: #fff;
text-decoration: none;
}