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WEB前端：04_slider幻灯片(焦点图轮换)

2024-07-02 15:07:50   225人阅读

slider幻灯片(焦点图轮换)

 

网站常用效果之一，以下为简化版，用于学习javascript基础知识。

效果图：

slider幻灯片(焦点图轮换) - 纯JS简化版

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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>slider幻灯片 - 纯JS简化版</title>
<style type="text/css">
*{margin: 0; padding: 0;}
/* slider */
#sliderbox { width: 500; height:313px;position: relative; overflow: hidden;margin: 20px;}
#slider {list-style: none; margin: 0; padding: 0;}
#slider li {float:left; margin: 0; padding: 0;}
#slidertab {position: absolute; right: 10px; bottom:10px; width: 80px; height: 20px; list-style: none;}
#slidertab li {float: left; width: 20px; height: 20px; margin: 2px; background: #eee;text-align: center; line-height: 20px;font-size: 12px;}
#slidertab li.sliderclass {background: #f00;}
</style>
<script type="text/javascript">
 
window.onload = function() {
 
    var sliderbox = document.getElementById(‘sliderbox‘);
    var slider = document.getElementById(‘slider‘);
    var sliderli = slider.getElementsByTagName(‘li‘);
    var slidertab = document.getElementById(‘slidertab‘);
    var slidertabli = slidertab.getElementsByTagName(‘li‘);
 
    var inow = 0;
 
    sliderbox.onmouseover = function() {
        clearInterval(timer);
    }
 
    sliderbox.onmouseout =function() {
        //clearInterval(timer);
        timer = setInterval(autoplay, 1000);
    }
 
    for(var i=0; i<slidertabli.length; i++) {
        slidertabli[i].index = i;
        slidertabli[i].onclick = function() {
            clearInterval(timer);
            for(var a=0; a<slidertabli.length; a++) {
                slidertabli[a].className = "";
                sliderli[a].style.display = "none";
            }
            this.className = "sliderclass";
            sliderli[this.index].style.display = "block";
            inow = this.index;
        }
    }
 
    function autoplay() {
        for(var i=0; i<sliderli.length; i++) {
 
            sliderli[i].style.display = ‘none‘;
            slidertabli[i].className = "";
        }
        sliderli[inow].style.display = ‘block‘;
        slidertabli[inow].className = "sliderclass";
        inow = inow==sliderli.length-1 ? 0 : inow+1;
    }
 
    timer = setInterval(autoplay, 1000);
}
 
</script>
</head>
<body>
 
<div id="sliderbox">
    <ul id="slider">
        <li><img src=http://www.mamicode.com/"tab1.jpg" /></li>
        <li><img src=http://www.mamicode.com/"tab2.jpg" /></li>
        <li><img src=http://www.mamicode.com/"tab3.jpg" /></li>
    </ul>
    <ul id="slidertab">
        <li>1</li>
        <li>2</li>
        <li>3</li>
    </ul>
</div>
 
</body>
</html>

 


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