JS实现的文字与图片定时切换效果代码

2019-11-20 11:29:25

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本文实例讲述了JS实现的文字与图片定时切换效果代码。分享给大家供大家参考。具体如下：

这是近来门户们都喜欢用的特效，左侧是一个大图片，右侧是对应文字，鼠标移动时，对应行的文字会变化，图片也相应的切换，如果没有鼠标动作时，它会自己播放，播放时间可调整，个人感觉挺不错的导航效果。

运行效果截图如下：

在线演示地址如下：

http://demo.VeVB.COm/js/2015/js-txt-pic-time-cha-tab-codes/

具体代码如下：

<head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>文字与图片切换</title><style>*{margin:0;padding:0;border:0;list-style:none}.focusPic{width:500px; margin:0 auto; clear:both; text-align:center; border:1px solid #ccc;}.focusPic .focusTitle{width:240px;float:right; font-size:14px; text-align:left;}.focusPic .focusTitle li{height:28px; line-height:28px; cursor:pointer; font-size:12px; padding-left:10px; }.focusPic .focusTitle li a ,.focusPic .focusTitle li a:visited { color:#000;}.focusPic .focusTitle li a:hover {color:#bc2931;}.focusPic .focusTitle .current a ,.focusPic .focusTitle .current a:visited { color:#bc2931;}.focusPic .focusTitle .current a:hover {color:#bc2931;}.focusPic #focusMenu li.current{background:#efefef;font-weight:bold;color:#bc2931;}.focusPic #focusLeft{width:250px;overflow:hidden; float:left;background:#efefef;font-size:14px;line-height:100px;font-weight:bold;height:168px;}.focusPic #focusLeft li{display:none;}.focusPic #focusLeft li.current{display:block;}</style></head><body><div class="focusPic"><ul id="focusLeft"><li class="current">VB在线出题考试系统</li><li>jQuery 仿iGoogle 主页模块拖动</li><li>jQuery UI 官方实例集</li><li>VB在线出题考试系统</li><li>小妖ASP投票调查系统 v4.0</li><li>jQuery 带动画的日期选择插件</li></ul><div class="focusTitle"><ul id="focusMenu"><li class="current"><a href="#">VB在线出题考试系统</a></li><li><a href="#" target="_blank">jQuery 仿iGoogle 主页模块拖动</a></li><li><a href="#" target="_blank">jQuery UI 官方实例集</a></li><li><a href="#" target="_blank">VB在线出题考试系统（MSSQL）</a></li><li><a href="#" target="_blank">小妖ASP投票调查系统 v4.0</a></li><li><a href="#" target="_blank">jQuery 带动画的日期选择插件</a></li></ul></div><div class="clear"></div></div><script language="javascript" type="text/javascript">//<![CDATA[var $ = function(id) { return document.getElementById(id);};Function.prototype.bind = function() { if (arguments.length < 2 && arguments[0] == null) {  return this; } var __method = this, args = $A(arguments), object = args.shift(); return function() {  return __method.apply(object, args.concat($A(arguments))); };};var isArray = function(testVar) { return Array == testVar.constructor ? 1 : String != testVar.constructor && null != testVar.length && !testVar.alert && !testVar.nodeType ? 2 : 0;};var $A = function(variable) { switch (isArray(variable)) {  case 1:   return variable;  case 2:   var arr = [], i = -1, len = variable.length;   while (++i < len) {    arr[i] = variable[i];   }   return arr;  default:   return [variable]; }};var addClass = function(elem, className) { if ((" " + elem.className + " ").indexOf(" " + className + " ") == -1) {  if (elem.className == "") {   elem.className = className;  } else {   elem.className += (" " + className);  } }};var removeClass = function(elem, className) { var newClass = (" " + elem.className + " ").replace(" " + className + " ", " "); elem.className = newClass.substr(1, newClass.length - 2);};var addEvent = function(elem, eventName, handler) { if (elem.addEventListener) {  elem.addEventListener(eventName, handler, false); } else if (elem.attachEvent) {  elem.attachEvent("on" + eventName, handler); }};function Slide(menus, contents, css, eventName, interval) { var curSeq = 0, length = contents.length, timerIds = [], isStopped; if (menus && length != menus.length) {  throw new Error("the amount of menus and contents is not equal"); } var hide = function(seq) {  removeClass(contents[seq], css);  if (menus) {   removeClass(menus[seq], css);  } }; var show = function(seq) {  addClass(contents[seq], css);  if (menus) {   addClass(menus[seq], css);  }  curSeq = seq; }; this.showNext = function() {  var next = curSeq + 1;  if (next >= length) {   next = 0;  }  var i = length;  while (--i >= 0) {   if (i != next) {    hide(i);   } else {    show(i);   }  } }; this.change = function(event) {  if (this != menus[curSeq]) {   var i = length;   while (--i >= 0) {    if (menus[i] != this) {     hide(i);    } else {     show(i);    }   }  }  e = window.event || event;  e.cancelBubble = true; }; this.play = function(speed) {  isStopped = false;  timerIds.push(setInterval(this.showNext.bind(this), speed)); }; this.pause = function() {  isStopped = true;  var i = length;  while (--i >= 0) {   clearInterval(timerIds[i]);   timerIds.splice(i, 1);  } }; var i = length; while (--i >= 0) {  addEvent(menus[i], eventName, this.change.bind(menus[i]));  if (interval > 0) {   addEvent(menus[i], "mouseover", this.pause);   addEvent(menus[i], "mouseout", this.play.bind(this, interval));  } } if (interval > 0) {  this.play(interval); }}var focusImg = new Slide($("focusMenu").getElementsByTagName("li"), $("focusLeft").getElementsByTagName("li"), "current", "mouseover", 3000);//]]></script></body>

希望本文所述对大家的JavaScript程序设计有所帮助。

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