• 图片切换综合实例


     1 <!DOCTYPE HTML>
     2 <html>
     3 <head>
     4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
     5 <title>无标题文档</title>
     6 <style>
     7 p { margin:0; }
     8 body { text-align:center; }
     9 #box { 400px; height:400px; border:10px solid #ccc; margin:50px auto 0; position:relative; }
    10 a { 40px; height:40px; background:#fff; filter:alpha(opacity:80); opacity:0.8; position:absolute; top:160px; font-size:18px; color:#000; text-align:center; line-height:40px; text-decoration:none; }
    11 a:hover { filter:alpha(opacity:30); opacity:0.3; }
    12 #prev { left:10px; }
    13 #next { right:10px; }
    14 #p1 { 400px; height:30px; line-height:30px; text-align:center; background:#000; color:#fff; font-size:14px; filter:alpha(opacity:80); opacity:0.8; position:absolute; bottom:0; left:0; }
    15 strong { 400px; height:30px; line-height:30px; text-align:center; background:#000; color:#fff; font-size:14px; filter:alpha(opacity:80); opacity:0.8; position:absolute; top:0; left:0; }
    16 #img1 { 400px; height:400px; }
    17 span { position:absolute; 400px; height:30px; line-height:30px; text-align:center; top:-50px; left:0; font-family:'微软雅黑'; }
    18 </style>
    19 <script>
    20 window.onload = function (){
    21     var oPrev = document.getElementById('prev');
    22     var oNext = document.getElementById('next');
    23     var oP = document.getElementById('p1');
    24     var oStrong = document.getElementById('strong1');
    25     var oImg = document.getElementById('img1');
    26     var aBtn = document.getElementsByTagName('input');
    27     
    28     var arrUrl = [ 'img/1.jpg', 'img/2.jpg', 'img/3.jpg', 'img/4.jpg' ];
    29     var arrText = [ '文字一', '文字二', '文字三', '识文断字' ];
    30     var num = 0;
    31     var onOff = true;
    32     
    33     aBtn[0].onclick = function (){ onOff = true; document.getElementsByTagName('span')[0].innerHTML = '图片可从最后一张跳转到第一张循环切换'; };
    34     aBtn[1].onclick = function (){ onOff = false; document.getElementsByTagName('span')[0].innerHTML = '图片只能到最后一张或只能到第一张切换'; };
    35     
    36     // 初始化
    37     function fnTab(){
    38         oP.innerHTML = arrText[num];
    39         oStrong.innerHTML = num+1 + ' / ' + arrText.length;
    40         oImg.src = arrUrl[num];
    41     }
    42     fnTab();
    43     
    44     oPrev.onclick = function (){
    45         num --;
    46         if( num == -1 ){
    47             if(onOff){num = arrText.length-1;}else{
    48                 alert('这已经是第一张了,不能再往前了~~');
    49                 num = 0;
    50             }
    51             //num = arrText.length-1;
    52         }
    53         fnTab();
    54     };
    55     oNext.onclick = function (){
    56         num ++;
    57         if( num == arrText.length ){
    58             if(onOff){num = 0;}else{
    59                 alert('已经到最后一张啦~');
    60                 num = arrText.length-1;
    61             }
    62         }
    63         fnTab();
    64     };
    65     
    66 };
    67 </script>
    68 </head>
    69 
    70 <body>
    71 
    72 <input type="button" value="循环切换" />
    73 <input type="button" value="顺序切换" />
    74 
    75 
    76 <div id="box"><span>图片可从最后一张跳转到第一张循环切换</span>
    77     <a id="prev" href="javascript:;"><</a>
    78     <a id="next" href="javascript:;">></a>
    79   <p id="p1">图片文字加载中……</p>
    80   <strong id="strong1">图片数量计算中……</strong>
    81     <img id="img1" />
    82 </div>
    83 
    84 </body>
    85 </html>
    示例代码
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  • 原文地址:https://www.cnblogs.com/123wyy123wyy/p/6896618.html
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