这里演示基于jquery实现的动画菜单,内含四种效果的网站菜单,第一种是不带效果的传统导航菜单,第二种是带有图形滚动背景的菜单,第三种是由右向左背景滚动的菜单,第四种则是背景色渐变的网站菜单,每一种都很精彩,喜欢Js菜单的可模仿借鉴一下。
运行效果截图如下:
在线演示地址如下:
具体代码如下:
<!DOCTYPE html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gbk" /> <title>jQuery动态背景导航菜单</title> <style type="text/css"> h2{clear: both;padding-top: 20px;} ul{list-style: none;margin: 0;padding: 0;} li{float: left;width: 100px;margin: 0;padding: 0;text-align: center;} li a{display: block;padding: 5px 10px;height: 100%;color: #FFF;text-decoration: none;border-right: 1px solid #FFF;} li a{background: url(images/bg2.jpg) repeat 0 0;} li a: hover, li a: focus, li a: active{background-position: -150px 0;} #a a{background: url(images/bg.jpg) repeat -20px 35px;} #b a{background: url(images/bg2.jpg) repeat 0 0;} #c a{background: url(images/bg3.jpg) repeat 0 0;} #d a{background: url(images/bg4.jpg) repeat 0 0;} </style> <script type="text/javascript" src="https://www.jb51.net/jquery-1.6.2.min.js"></script> <script type="text/javascript"> (function($) { $.extend($.fx.step,{ backgroundPosition: function(fx) { if (fx.state === 0 && typeof fx.end == 'string') { var start = $.curCSS(fx.elem,'backgroundPosition'); start = toArray(start); fx.start = [start[0],start[2]]; var end = toArray(fx.end); fx.end = [end[0],end[2]]; fx.unit = [end[1],end[3]]; } 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]; 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]]; } } }); })(jQuery); </script> <script type="text/javascript"> $(function(){ $('#a a') .css( {backgroundPosition: "-20px 35px"} ) .mouseover(function(){ $(this).stop().animate({backgroundPosition:"(-20px 94px)"}, {duration:500}) }) .mouseout(function(){ $(this).stop().animate({backgroundPosition:"(40px 35px)"}, {duration:200, complete:function(){ $(this).css({backgroundPosition: "-20px 35px"}) }}) }) $('#b a') .css( {backgroundPosition: "0 0"} ) .mouseover(function(){ $(this).stop().animate({backgroundPosition:"(-150px 0)"}, {duration:500}) }) .mouseout(function(){ $(this).stop().animate({backgroundPosition:"(-300px 0)"}, {duration:200, complete:function(){ $(this).css({backgroundPosition: "0 0"}) }}) }) $('#c a') .css( {backgroundPosition: "0 0"} ) .mouseover(function(){ $(this).stop().animate({backgroundPosition:"(0 -250px)"}, {duration:500}) }) .mouseout(function(){ $(this).stop().animate({backgroundPosition:"(0 0)"}, {duration:500}) }) $('#d a') .css( {backgroundPosition: "0 0"} ) .mouseover(function(){ $(this).stop().animate({backgroundPosition:"(0 -250px)"}, {duration:500}) }) .mouseout(function(){ $(this).stop().animate({backgroundPosition:"(0 0)"}, {duration:500}) }) }); </script> <meta http-equiv="Content-Type" content="text/html;charset=gbk"> </head> <body> <h1>jQuery Background Position</h1> <h2>Example 0: No Script</h2> <ul> <li><a href="#">Home</a></li> <li><a href="#">About</a></li> <li><a href="#">Contact</a></li> </ul> <h2>Example A: Top down</h2> <ul> <li><a href="#">Home</a></li> <li><a href="#">About</a></li> <li><a href="#">Contact</a></li> </ul> <h2>Example B: Right left</h2> <ul> <li><a href="#">Home</a></li> <li><a href="#">About</a></li> <li><a href="#">Contact</a></li> </ul> <h2>Example C: Fade 1-colour</h2> <ul> <li><a href="#">Home</a></li> <li><a href="#">About</a></li> <li><a href="#">Contact</a></li> </ul> <h2>Example D: Fade 2-colour</h2> <ul> <li><a href="#">Home</a></li> <li><a href="#">About</a></li> <li><a href="#">Contact</a></li> </ul> </body> </html>