<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>无标题文档</title> <style> ul { padding:0; margin:0; } li { list-style:none; } body { background:#333; } #pic { width:400px; height:500px; position:relative; margin:0 auto; background:url(img/loader_ico.gif) no-repeat center #fff; } #pic img { width:400px; height:500px; } #pic ul { width:40px; position:absolute; top:0; right:-50px; } #pic li { width:40px; height:40px; margin-bottom:4px; background:#666; } #pic .active { background:#FC3; } #pic span { top:0; } #pic p { bottom:0; margin:0; } #pic p,#pic span { position:absolute; left:0; width:400px; height:30px; line-height:30px; text-align:center; color:#fff; background:#000; } </style> <script> window.onload = function (){ var oDiv = document.getElementById('pic'); var oImg = oDiv.getElementsByTagName('img')[0]; var oSpan = oDiv.getElementsByTagName('span')[0]; var oP = oDiv.getElementsByTagName('p')[0]; var oUl = oDiv.getElementsByTagName('ul')[0]; var aLi = oUl.getElementsByTagName('li'); var arrUrl = [ 'img/1.png', 'img/2.png', 'img/3.png', 'img/4.png' ]; var arrText = [ '小宠物', '图片二', '图片三', '面具' ]; var num = 0; var oldLi = null; for( var i=0; i<arrUrl.length; i++ ){ oUl.innerHTML += '<li></li>'; }
//一定要在 li 创建 后 oldLi = aLi[num]; // 初始化 oImg.src = arrUrl[num]; oSpan.innerHTML = 1+num+' / '+arrUrl.length; oP.innerHTML = arrText[num]; aLi[num].className = 'active'; for( var i=0; i<aLi.length; i++ ){ aLi[i].index = i; // 索引值 aLi[i].onclick = function (){ oImg.src = arrUrl[ this.index ]; oP.innerHTML = arrText[ this.index ]; oSpan.innerHTML = 1+this.index + ' / '+arrText.length; /* <li class="active"></li> <li></li> <li></li> <li></li> */ // 思路一：全部清空，当前添加 // for( var i=0; i<aLi.length; i++ ){ // aLi[i].className = ''; // } // this.className = 'active'; // 思路二：清空上个，当前添加 oldLi.className = ''; oldLi = this; this.className = 'active'; }; } }; </script> </head> <body> <div id="pic"> <img src="" /> <span>数量正在加载中……</span> <p>文字说明正在加载中……</p> <ul></ul> </div> </body> </html>