前言:
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* { padding:0; margin:0;}body { font-size:12px; padding:100px;}ul { list-style-type:none;}ul li { float:left; width:15px; height:15px; margin-right:10px; cursor:pointer; display:block; overflow:hidden; background-image:url(../images/demo14_bg.gif);}#demo14_skin_1 { background-position:0 0;}#demo14_skin_2 { background-position:-25px 0;}#demo14_skin_3 { background-position:-50px 0;}#demo14_skin_1.selected { background-position:0 -16px;}#demo14_skin_2.selected { background-position:-25px -16px;}#demo14_skin_3.selected { background-position:-50px -16px;}.box { width:1000px; clear:both; height:500px; margin-top:30px; border:1px solid #fff;}
body { background:red;}.box { background:url(../images/red.PNG);}
body { background:green;}.box { background:url(../images/green.PNG);}
body { background:blue;}.box { background:url(../images/blue.PNG);}
Html:
<html ><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><link rel="stylesheet" type="text/css" href="css/demo14.css"/><link rel="stylesheet" type="text/css" href="css/demo14_skin_1.css" id="cssfile"/><script src="js/jquery-3.4.1.min.js"></script><script type="text/javascript"> $(document).ready(function(){ $("li").click(function(){ $("#"+this.id) .addClass("selected") .siblings() .removeClass("selected"); $("#cssfile").attr("href","css/"+this.id+".css"); }); });</script></head><body> <ul> <li id="demo14_skin_1" class="selected"></li> <li id="demo14_skin_2"></li> <li id="demo14_skin_3"></li> </ul> <div class="box"></div></body></html>
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