css js 焦点图
本例非jquery
css文件可以演示地址看源码
XML/HTML Code复制内容到剪贴板
- <SCRIPT type=text/javascript>
- var $ = function (id) {
- return "string" == typeof id ? document.getElementById(id) : id;
- };
- var Extend = function(destination, source) {
- for (var property in source) {
- destination[property] = source[property];
- }
- return destination;
- }
- var CurrentStyle = function(element){
- return element.currentStyle || document.defaultView.getComputedStyle(element, null);
- }
- var Bind = function(object, fun) {
- var args = Array.prototype.slice.call(arguments).slice(2);
- return function() {
- return fun.apply(object, args.concat(Array.prototype.slice.call(arguments)));
- }
- }
- var Tween = {
- Quart: {
- easeOut: function(t,b,c,d){
- return -c * ((tt=t/d-1)*t*t*t - 1) + b;
- }
- },
- Back: {
- easeOut: function(t,b,c,d,s){
- if (s == undefined) s = 1.70158;
- return c*((tt=t/d-1)*t*((s+1)*t + s) + 1) + b;
- }
- },
- Bounce: {
- easeOut: function(t,b,c,d){
- if ((t/=d) < (1/2.75)) {
- return c*(7.5625*t*t) + b;
- } else if (t < (2/2.75)) {
- return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
- } else if (t < (2.5/2.75)) {
- return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
- } else {
- return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
- }
- }
- }
- }
- //容器对象,滑动对象,切换数量
- var SlideTrans = function(container, slider, count, options) {
- this._slider = $(slider);
- this._container = $(container);//容器对象
- this._timer = null;//定时器
- this._count = Math.abs(count);//切换数量
- this._target = 0;//目标值
- thisthis._t = this._b = this._c = 0;//tween参数
- this.Index = 0;//当前索引
- this.SetOptions(options);
- this.Auto = !!this.options.Auto;
- this.Duration = Math.abs(this.options.Duration);
- this.Time = Math.abs(this.options.Time);
- this.Pause = Math.abs(this.options.Pause);
- thisthis.Tween = this.options.Tween;
- thisthis.onStart = this.options.onStart;
- thisthis.onFinish = this.options.onFinish;
- var bVertical = !!this.options.Vertical;
- this._css = bVertical ? "top" : "left";//方向
- //样式设置
- var p = CurrentStyle(this._container).position;
- p == "relative" || p == "absolute" || (this._container.style.position = "relative");
- this._container.style.overflow = "hidden";
- this._slider.style.position = "absolute";
- thisthis.Change = this.options.Change ? this.options.Change :
- this._slider[bVertical ? "offsetHeight" : "offsetWidth"] / this._count;
- };
- SlideTrans.prototype = {
- //设置默认属性
- SetOptions: function(options) {
- this.options = {//默认值
- Vertical: true,//是否垂直方向(方向不能改)
- Auto: true,//是否自动
- Change: 0,//改变量
- Duration: 50,//滑动持续时间
- Time: 10,//滑动延时
- Pause: 4000,//停顿时间(Auto为true时有效)
- onStart: function(){},//开始转换时执行
- onFinish: function(){},//完成转换时执行
- Tween: Tween.Quart.easeOut//tween算子
- };
- Extend(this.options, options || {});
- },
- //开始切换
- Run: function(index) {
- //修正index
- index == undefined && (index = this.Index);
- index < 0 && (index = this._count - 1) || index >= this._count && (index = 0);
- //设置参数
- this._target = -Math.abs(this.Change) * (this.Index = index);
- this._t = 0;
- this._b = parseInt(CurrentStyle(this._slider)[this.options.Vertical ? "top" : "left"]);
- thisthis._c = this._target - this._b;
- this.onStart();
- this.Move();
- },
- //移动
- Move: function() {
- clearTimeout(this._timer);
- //未到达目标继续移动否则进行下一次滑动
- if (this._c && this._t < this.Duration) {
- this.MoveTo(Math.round(this.Tween(this._t++, this._b, this._c, this.Duration)));
- this._timer = setTimeout(Bind(this, this.Move), this.Time);
- }else{
- this.MoveTo(this._target);
- this.Auto && (this._timer = setTimeout(Bind(this, this.Next), this.Pause));
- }
- },
- //移动到
- MoveTo: function(i) {
- this._slider.style[this._css] = i + "px";
- },
- //下一个
- Next: function() {
- this.Run(++this.Index);
- },
- //上一个
- Previous: function() {
- this.Run(--this.Index);
- },
- //停止
- Stop: function() {
- clearTimeout(this._timer); this.MoveTo(this._target);
- }
- };
- </SCRIPT>
- </head>
- <body style="text-align:center">
- <DIV id=idContainer2 class=container>
- <div align="center"><a href="../../archives/2010/11/3725.html"><h2>焦点图效果</h2></a></div>
- <TABLE id=idSlider2 border=0 cellSpacing=0 cellPadding=0>
- <TBODY>
- <TR>
- <TD class=td_f><A href="#" target="_blank"><IMG src="../dandong.png"></A></TD>
- <TD class=td_f><A href="#" target="_blank"><IMG src="../mohe.png"></A></TD>
- <TD class=td_f><A href="#" target="_blank"><IMG src="../changbaishan.png"></A></TD>
- </TR></TBODY></TABLE>
- <UL id=idNum class=num></UL>
- </DIV>
- <SCRIPT>
- var forEach = function(array, callback, thisObject){
- if(array.forEach){
- array.forEach(callback, thisObject);
- }else{
- for (var i = 0, len = array.length; i < len; i++) { callback.call(thisObject, array[i], i, array); }
- }
- }
- var st = new SlideTrans("idContainer2", "idSlider2", 3, { Vertical: false });
- var nums = [];
- //插入数字
- for(var i = 0, n = st._count - 1; i <= n;){
- (nums[i] = $("idNum").appendChild(document.createElement("li"))).innerHTML = ++i;
- }
- forEach(nums, function(o, i){
- o.onmouseover = function(){ o.className = "on"; st.Auto = false; st.Run(i); }
- o.onmouseout = function(){ o.className = ""; st.Auto = true; st.Run(); }
- })
- //设置按钮样式
- st.onStart = function(){
- forEach(nums, function(o, i){ o.className = st.Index == i ? "on" : ""; })
- }
- st.Run();
- </SCRIPT>
原文地址:http://www.freejs.net/article_jiaodiantu_23.html