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jquery动态下滑菜单_有立体效果

时间：2013-08-07 08:29 来源：互联网作者：源码搜藏收藏推荐

<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jquery带立体感的动态导航菜单</title>
<style>
body, div, h1, h2, h3, h4, h5, h6, p, ul, ol, li, dl, dt, dd, img, form, fieldset, input, textarea, blockquote {
	margin: 0; padding: 0; border: 0;
}
body {
	background: #f5f0e0 url(http://www.codefans.net/jscss/demoimg/201308/noise.png);
}
#container {
	height: 800px;
	background: url(http://www.codefans.net/jscss/demoimg/201308/bg.jpg) center top no-repeat;
}
ul#nav {
	width: 700px; margin: 0 auto; text-align: center; overflow: hidden;
}
	ul#nav li {
	float: left; list-style: none; 
}
ul#nav li a {
	display: block; width: 97px; height: 77px; 
	padding: 72px 0 0 0; margin: 0 32px 0 32px;
	font: bold 16px Helvetica, Arial, Sans-Serif; text-transform: uppercase;
	color: #9c5959; text-shadow: 0 1px 3px #c4bda6; text-decoration: none;
	background: url(http://www.codefans.net/jscss/demoimg/201308/label.png) 0 -149px no-repeat; 
}
	ul#nav li a:hover {
	background: url(http://www.codefans.net/jscss/demoimg/201308/label.png) 0 0 no-repeat;
	color: #eee9d9; text-shadow: 0 2px 3px #4c2222;
}
ul#nav li a.js:hover {
	background: url(http://www.codefans.net/jscss/demoimg/201308/label.png) 0 -149px no-repeat;
}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.1/jquery.min.js" type="text/javascript"></script> 
<script type="text/javascript">
(function($) {
	if(!document.defaultView || !document.defaultView.getComputedStyle){ // IE6-IE8
		var oldCurCSS = jQuery.curCSS;
		jQuery.curCSS = function(elem, name, force){
			if(name === 'background-position'){
				name = 'backgroundPosition';
			}
			if(name !== 'backgroundPosition' || !elem.currentStyle || elem.currentStyle[ name ]){
				return oldCurCSS.apply(this, arguments);
			}
			var style = elem.style;
			if ( !force && style && style[ name ] ){
				return style[ name ];
			}
			return oldCurCSS(elem, 'backgroundPositionX', force) +' '+ oldCurCSS(elem, 'backgroundPositionY', force);
		};
	}
	var oldAnim = $.fn.animate;
	$.fn.animate = function(prop){
		if('background-position' in prop){
			prop.backgroundPosition = prop['background-position'];
			delete prop['background-position'];
		}
		if('backgroundPosition' in prop){
			prop.backgroundPosition = '('+ prop.backgroundPosition;
		}
		return oldAnim.apply(this, arguments);
	};
	function toArray(strg){
		strg = strg.replace(/left|top/g,'0px');
		strg = strg.replace(/right|bottom/g,'100%');
		strg = strg.replace(/([0-9\.]+)(\s|\)|$)/g,"$1px$2");
		var res = strg.match(/(-?[0-9\.]+)(px|\%|em|pt)\s(-?[0-9\.]+)(px|\%|em|pt)/);
		return [parseFloat(res[1],10),res[2],parseFloat(res[3],10),res[4]];
	}
	$.fx.step. backgroundPosition = function(fx) {
		if (!fx.bgPosReady) {
			var start = $.curCSS(fx.elem,'backgroundPosition');
			if(!start){//FF2 no inline-style fallback
				start = '0px 0px';
			}
			start = toArray(start);
			fx.start = [start[0],start[2]];
			var end = toArray(fx.options.curAnim.backgroundPosition);
			fx.end = [end[0],end[2]];
			fx.unit = [end[1],end[3]];
			fx.bgPosReady = true;
		}
		var nowPosX = [];
		nowPosX[0] = ((fx.end[0] - fx.start[0]) * fx.pos) + fx.start[0] + fx.unit[0];
		nowPosX[1] = ((fx.end[1] - fx.start[1]) * fx.pos) + fx.start[1] + fx.unit[1];           
		fx.elem.style.backgroundPosition = nowPosX[0]+' '+nowPosX[1];
	};
})(jQuery);
$(document).ready(function() {
	$("ul#nav li a").addClass("js");
	$("ul#nav li a").hover(
      function () {
        $(this).stop(true,true).animate({backgroundPosition:"(0 0)"}, 200);
        $(this).animate({backgroundPosition:"(0 -5px)"}, 150);
      }, 
      function () {
        $(this).animate({backgroundPosition:"(0 -149px)"}, 200);

}
    );
});
</script>
</head>
<body>
<div id="container">
	<ul id="nav">
		<li><a href="http://www.codesocang.com">Home</a></li>
		<li><a href="http://www.iseedy.com">About</a></li>
		<li><a href="http://www.28btv.com">Work</a></li>
		<li><a href="http://www.xz2018.com">Contact</a></li>
	</ul>
</div>
</body>
</html>

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