Lösungen ,

jquery-background.php

Quell Code

<!DOCTYPE HTML>
<html lang="en">
<head>
<title>jQuery Background Test</title>

<style>
    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(https://snook.ca/technical/jquery-bg/bg2.jpg) repeat 0 0;}
	li a:hover, li a:focus, li a:active {background-position:-150px 0;}
	#a a {background:url(https://snook.ca/technical/jquery-bg/bg.jpg) repeat -20px 35px;}
	#b a {background:url(https://snook.ca/technical/jquery-bg/bg2.jpg) repeat 0 0;}
	#c a {background:url(https://snook.ca/technical/jquery-bg/bg3.jpg) repeat 0 0;}
	#d a {background:url(https://snook.ca/technical/jquery-bg/bg4.jpg) repeat 0 0;}
</style>

<script  src="https://snook.ca/technical/jquery-bg/jquery-1.2.6.min.js"></script>
  
<script>
 
(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>

$(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>

</head>
<body>
<h1>jQuery Background Position</h1>
<h2>Example 0: No Script</h2>
	<ul id="noscript">
		<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 id="a">
		<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 id="b">
		<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 id="c">
		<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 id="d">
		<li><a href="#">Home</a></li>
		<li><a href="#">About</a></li>
		<li><a href="#">Contact</a></li>
	</ul>
</body>
</html>