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纯CSS实现的多级下拉导航菜单5，可设定下拉菜单宽度
兼容性：IE6+ FireFox2+ Opera9+   更新时间：2010-01-31

简介：无需任何javascript代码的导航菜单，可以多级下拉，自由控制下拉项的宽度


纯CSS实现的多级下拉导航菜单5，可设定下拉菜单宽度

查看源代码：查看




使用说明：
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在网页<head>区添加以下代码
<style type="text/css"> 
/* for this demo only */
#backgroundHolder {width:750px; height:490px; padding-top:10px; background:url(ulmulti5/pic.jpg); margin:0 auto; text-align:center;}
/* ----------------------------------------------------------------------------	*/
/* default styling */
.nav, .nav ul {list-style-type:none; margin:0; padding:0;}
.nav a {text-decoration:none;}
.nav {font-family: arial, sans-serif; font-size:12px; width:460px; margin:0 auto; text-align:left;}
 
/* style the links */
/* needs a background for IE6 - can be a color or a transparent gif */
.nav a {background:url(trans.gif); filter: alpha(opacity=90); opacity:0.9;} 
 
/* style the <b> element so that is does not affect the size of the link */
.nav a b {color:#fff; font-weight:normal; display:block; padding:5px 10px; margin-right:1px;}
.nav a:hover b {color:#000; cursor:pointer; border-left:2px solid #eee;}
.nav .fly .main b {background: transparent url(ulmulti5/arrow.gif) no-repeat right 9px;}
.nav .down b {background: transparent url(ulmulti5/arrow2.gif) no-repeat right 11px;}
/* for the offset left dropdown and flyout */
.nav .nav4 ul b {text-align:right;}
.nav .nav4 ul .main b {background: transparent url(ulmulti5/arrow3.gif) no-repeat left 9px; text-align:right;}
.nav .nav4 ul a:hover b {border-left:0; border-right:2px solid #eee;}
 
/* HEIGHT */
.nav ul ul {top:-25px;} /* position the top of the flyout sub menus */
.nav ul ul.two {top:-40px;} /* position the top of the flyout sub menus */
 
/* WIDTH change this WITH CARE to suit your requirements */
 
/* FOR NAV1 */
.nav1 {width:80px;}
.nav1 a {width:80px;}
.nav1 a b {background-color:#764;}
 
/* FOR NAV2 */
.nav2,
.nav2 a {width:100px;}
.nav .nav2 a b,
.nav .nav2 .fly a b {background-color:#887;}
.nav2 ul li {max-width:100px;}
.nav2 ul a {width:130px;}
.nav2 ul ul {left:130px;}
.nav2 a {margin-right:-99px;}
.nav2 ul a {margin-right:-129px;}
 
/* FOR NAV3 */
.nav3,
.nav3 a {width:100px;}
.nav .nav3 a b,
.nav .nav3 .fly a b {background-color:#775;}
.nav3 ul li {max-width:100px;}
.nav3 ul a {width:120px;}
.nav3 ul ul {left:120px;}
.nav3 a {margin-right:-99px;}
.nav3 ul a {margin-right:-119px;}
 
/* FOR NAV3 */
.nav4,
.nav4 a {width:80px;}
.nav .nav4 a b,
.nav .nav4 .fly a b {background-color:#675;}
.nav4 ul li {max-width:80px;}
.nav4 ul a {width:110px;}
.nav4 ul {left:-30px;} /* position the dropdown left */
.nav4 ul ul {left:auto; right:110px;}  /* position the flyouts left */
.nav4 a {margin-right:-79px;}
.nav4 ul a {margin-right:-109px;}
 
 
/* FOR NAV5 */
.nav5 {width:100px;}
.nav5 a {width:100px;}
.nav5 a b {background-color:#a54; margin-right:0;}
 
/* ----------------------------------------------------------------------------	*/
 
/* DO NOT CHANGE ANYTHING BELOW */
.nav li {float:left;} /* fixes several IE related bugs, and allows for clearing */
.nav ul {float:left; position:relative; z-index:20;} /* necessary for float drop and to stack the <ul>s */
.nav ul li {clear:left;} /* must clear the floated list item inside sublist */
.nav a {position:relative; display:block;} /* needs to have a position, to be above the rest */
.nav a.main {float:left; /* necessary for float drop */
    margin-top:10000px;} /* bring the top level links back into view */
.nav .drop,
.nav .fly {margin-top:-10000px;} /* hide the sub links and their containers, opera has low upper limits */
.nav ul {margin-bottom:-5000px;} /* avoid any interaction between the subs, can be any large size */
 
/* The bit that does ALL the work to bring the sub menus into view */
.nav a:hover,
.nav a:focus,
.nav a:active {margin-right:0; z-index:10; outline:0;}
 
.nav a:hover b,
.nav a:focus b,
.nav a:active b {color:#000; cursor:pointer; border-left:2px solid #eee;}
 
.nav .nav4 ul a:hover b,
.nav .nav4 ul a:focus b,
.nav .nav4 ul a:active b {border-left:0; border-right:2px solid #eee;}
 
.nav2 ul a:hover,
.nav2 ul a:focus,
.nav2 ul a:active {margin-right:-30px; z-index:10; outline:0;}
 
.nav3 ul a:hover,
.nav3 ul a:focus,
.nav3 ul a:active {margin-right:-20px; z-index:10; outline:0;}
 
.nav4 ul a:hover,
.nav4 ul a:focus,
.nav4 ul a:active {margin-right:-30px; z-index:10; outline:0;}
 
/* OPERA fix */
.nav ul:hover,
.nav ul ul:hover {clear:left;} /* to stop intermittent sub link :hover problems */
 
/* ----------------------------------------------------------------------------	*/
</style> 
 
<!--[if lte IE 7]>
<style type="text/css">
/* bug fixes for IE7 and lower - DO NOT CHANGE */
.nav .fly {width:99%;} /* make each flyout 99% of the prevous flyout */
a:active {} /* requires a blank style for :active to stop it being buggy */
</style>
<![endif]--> 



在网页<body>区添加以下代码

<div id="backgroundHolder"> 
	<ul class="nav"> 
		<li class="nav1 drop"><a class="main" href="#url"><b>Home</b></a></li> 
		<li class="nav2 drop"><a class="main down" href="#url"><b>Equipment</b></a> 
			<ul> 
				<li class="fly"><a class="main" href="#url"><b>Cameras</b></a> 
					<ul> 
						<li><a href="#url"><b>Film Type</b></a></li> 
						<li><a href="#url"><b>Compact</b></a></li> 
						<li><a href="#url"><b>Polaroid</b></a></li> 
						<li><a href="#url"><b>Digital</b></a></li> 
						<li class="fly"><a class="main" href="#url"><b>Digital SLR</b></a> 
							<ul> 
								<li><a href="#url"><b>Canon</b></a></li> 
								<li><a href="#url"><b>Nikon</b></a></li> 
								<li><a href="#url"><b>Panasonic</b></a></li> 
								<li><a href="#url"><b>Kodak</b></a></li> 
							</ul> 
						</li> 
						<li><a href="#url"><b>Second Hand</b></a></li> 
					</ul> 
				</li> 
				<li class="fly"><a class="main" href="#url"><b>Video Cameras &amp; Accessories</b></a> 
					<ul class="two"> 
						<li class="fly"><a class="main" href="#url"><b>Latest Models</b></a> 
							<ul> 
								<li><a href="#url"><b>Nikon</b></a></li> 
								<li><a href="#url"><b>Panasonic</b></a></li> 
								<li><a href="#url"><b>Canon</b></a></li> 
								<li><a href="#url"><b>Pentax</b></a></li> 
								<li><a href="#url"><b>Minolta</b></a></li> 
							</ul> 
						</li> 
						<li><a href="#url"><b>Special Offers</b></a></li> 
						<li><a href="#url"><b>Professional</b></a></li> 
					</ul> 
				</li> 
				<li class="fly"><a class="main" href="#url"><b>Lenses</b></a> 
					<ul> 
						<li class="fly"><a class="main" href="#url"><b>Digital</b></a> 
							<ul> 
								<li><a href="#url"><b>Standard</b></a></li> 
								<li><a href="#url"><b>Telephoto</b></a></li> 
								<li><a href="#url"><b>Wide Angle</b></a></li> 
								<li class="fly"><a class="main" href="#url"><b>Zoom</b></a> 
									<ul> 
										<li><a href="#url"><b>Nikon</b></a></li> 
										<li><a href="#url"><b>Pentax</b></a></li> 
										<li><a href="#url"><b>Minolta</b></a></li> 
										<li><a href="#url"><b>Panasonic</b></a></li> 
									</ul> 
								</li> 
								<li class="fly"><a class="main" href="#url"><b>Zoom with Macro</b></a> 
									<ul> 
										<li><a href="#url"><b>Panasonic</b></a></li> 
										<li><a href="#url"><b>Minolta</b></a></li> 
										<li><a href="#url"><b>Pentax</b></a></li> 
										<li><a href="#url"><b>Canon</b></a></li> 
										<li><a href="#url"><b>Nikon</b></a></li> 
									</ul> 
								</li> 
								<li><a href="#url"><b>Fisheye</b></a></li> 
								<li><a href="#url"><b>x2 converters</b></a></li> 
							</ul> 
						</li> 
						<li class="fly"><a class="main" href="#url"><b>Standard SLR</b></a> 
							<ul> 
								<li><a href="#url"><b>Canon</b></a></li> 
								<li><a href="#url"><b>Nikon</b></a></li> 
								<li><a href="#url"><b>Panasonic</b></a></li> 
								<li><a href="#url"><b>Pentax</b></a></li> 
								<li><a href="#url"><b>Minolta</b></a></li> 
							</ul> 
						</li> 
						<li><a href="#url"><b>Cases</b></a></li> 
						<li class="fly"><a class="main" href="#url"><b>Large Format</b></a> 
							<ul> 
								<li><a href="#url"><b>Hasselblad</b></a></li> 
								<li><a href="#url"><b>Arca-Swiss</b></a></li> 
								<li><a href="#url"><b>Leica</b></a></li> 
							</ul> 
						</li> 
						<li><a href="#url"><b>Lens Hoods</b></a></li> 
						<li><a href="#url"><b>Lens Cleaners</b></a></li> 
					</ul> 
				</li> 
				<li><a href="#url"><b>Tripods</b></a></li> 
				<li><a href="#url"><b>Flashguns</b></a></li> 
				<li><a href="#url"><b>Accessories, filters & lens covers</b></a></li> 
				<li><a href="#url"><b>Special Offers</b></a></li> 
				<li><a href="#url"><b>Electronics</b></a></li> 
			</ul> 
		</li> 
		<li class="nav3 drop"><a class="main down" href="#url"><b>Accessories</b></a> 
			<ul> 
				<li class="fly"><a class="main" href="#url"><b>Flashguns</b></a> 
					<ul> 
						<li class="fly"><a class="main" href="#url"><b>Digital Cameras</b></a> 
							<ul> 
								<li><a href="#url"><b>Nikon</b></a></li> 
								<li><a href="#url"><b>Canon</b></a></li> 
								<li><a href="#url"><b>Panasonic</b></a></li> 
								<li><a href="#url"><b>Pentax</b></a></li> 
								<li><a href="#url"><b>Kodak</b></a></li> 
							</ul> 
						</li> 
						<li><a href="#url"><b>Film Cameras</b></a></li> 
						<li><a href="#url"><b>Reflectors</b></a></li> 
						<li><a href="#url"><b>Stands</b></a></li> 
						<li><a href="#url"><b>Remote Control</b></a></li> 
						<li><a href="#url"><b>Batteries</b></a></li> 
					</ul> 
				</li> 
				<li class="fly"><a class="main" href="#url"><b>Filters</b></a> 
					<ul> 
						<li><a href="#url"><b>Ultra Violet</b></a></li> 
						<li><a href="#url"><b>Lens protection</b></a></li> 
						<li><a href="#url"><b>Yellow</b></a></li> 
						<li><a href="#url"><b>Red</b></a></li> 
						<li><a href="#url"><b>Orange</b></a></li> 
						<li><a href="#url"><b>Blue</b></a></li> 
					</ul> 
				</li> 
				<li class="fly"><a class="main" href="#url"><b>Remote Control</b></a> 
					<ul> 
						<li><a href="#url"><b>Canon</b></a></li> 
						<li><a href="#url"><b>Nikon</b></a></li> 
						<li><a href="#url"><b>Pentax</b></a></li> 
					</ul> 
				</li> 
				<li class="fly"><a class="main" href="#url"><b>Camera Cases</b></a> 
					<ul> 
						<li><a href="#url"><b>Pentax</b></a></li> 
						<li><a href="#url"><b>Nikox</b></a></li> 
						<li><a href="#url"><b>Canon</b></a></li> 
						<li><a href="#url"><b>Pentax</b></a></li> 
						<li><a href="#url"><b>Kodak</b></a></li> 
						<li><a href="#url"><b>Minolta</b></a></li> 
					</ul> 
				</li> 
				<li><a href="#url"><b>Lens Brush</b></a></li> 
			</ul> 
		</li> 
		<li class="nav4 drop"><a class="main down" href="#url"><b>Outlets</b></a> 
			<ul> 
				<li><a href="#url"><b>Support</b></a></li> 
				<li><a href="#url"><b>Buying</b></a></li> 
				<li><a href="#url"><b>Photographers</b></a></li> 
				<li class="fly"><a class="main" href="#url"><b>Stockist</b></a> 
					<ul> 
						<li><a href="#url"><b>Currys</b></a></li> 
						<li><a href="#url"><b>Dixons</b></a></li> 
						<li><a href="#url"><b>Jessops</b></a></li> 
						<li><a href="#url"><b>Staples</b></a></li> 
					</ul> 
				</li> 
				<li><a href="#5"><b>General</b></a></li> 
				<li class="fly"><a class="main" href="#url"><b>Sales</b></a> 
					<ul> 
						<li><a href="#url"><b>USA</b></a></li> 
						<li><a href="#url"><b>CANADA</b></a></li> 
						<li><a href="#url"><b>South America</b></a></li> 
						<li class="fly"><a class="main" href="#url"><b>Europe</b></a> 
							<ul> 
								<li><a href="#url"><b>Britain</b></a></li> 
								<li><a href="#url"><b>France</b></a></li> 
								<li><a href="#url"><b>Germany</b></a></li> 
								<li><a href="#url"><b>Spain</b></a></li> 
								<li><a href="#url"><b>Italy</b></a></li> 
							</ul> 
						</li> 
						<li><a href="#url"><b>Australia</b></a></li> 
						<li><a href="#url"><b>Asia</b></a></li> 
					</ul> 
				</li> 
			</ul> 
		</li> 
		<li class="nav5 drop"><a class="main" href="#url"><b>Privacy Policy</b></a></li> 
	</ul> 
</div>


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