jQuery Background Position
Background Effekte bei Buttons
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<!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>