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JS文字和图片的定时切换效果代码分享

2015-10-25 20:25:09 来源:www.45fan.com 【

JS文字和图片的定时切换效果代码分享

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:

JS文字和图片的定时切换效果代码分享

在线演示地址如下:

http://demo.jb51.net/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。


本文地址:http://www.45fan.com/bcdm/25536.html
Tags: 实现 文字 图片
编辑:路饭网
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