JavaScript图像左右滑动焦点图
JavaScript Code
- <script type="text/javascript">
- //计算idslider2的宽度开始
- var kuan1=0;
- var kuand=document.getElementById('idSlider2')
- var kuan=document.getElementById('idSlider2').getElementsByTagName("li");
- var tpz=kuan.length;//图片总个数
- for(var i=0; i<kuan.length; i++){
- kuan1+=625;
- }
- kuand.style.width=kuan1+'px';
- //计算结束
- var $ = function (id) {
- return "string" == typeof id ? document.getElementById(id) : id;
- };
- var Class = {
- create: function() {
- return function() {
- this.initialize.apply(this, arguments);
- }
- }
- }
- Object.extend = function(destination, source) {
- for (var property in source) {
- destination[property] = source[property];
- }
- return destination;
- }
- var TransformView = Class.create();
- TransformView.prototype = {
- //容器对象,滑动对象,切换参数,切换数量
- initialize: function(container, slider, parameter, count, options) {
- if(parameter <= 0 || count <= 0) return;
- var oContainer = $(container), oSlider = $(slider), oThis = this;
- this.Index = 0;//当前索引
- this._timer = null;//定时器
- this._slider = oSlider;//滑动对象
- this._parameter = parameter;//切换参数
- this._count = count || 0;//切换数量
- this._target = 0;//目标参数
- this.SetOptions(options);
- this.Up = !!this.options.Up;
- this.Step = Math.abs(this.options.Step);
- this.Time = Math.abs(this.options.Time);
- this.Auto = !!this.options.Auto;
- this.Pause = Math.abs(this.options.Pause);
- this.onStart = this.options.onStart;
- this.onFinish = this.options.onFinish;
- oContainer.style.overflow = "hidden";
- oContainer.style.position = "relative";
- oSlider.style.position = "absolute";
- oSlider.style.top = oSlider.style.left = 0;
- },
- //设置默认属性
- SetOptions: function(options) {
- this.options = {//默认值
- Up: true,//是否向上(否则向左)
- Step: 5,//滑动变化率
- Time: 10,//滑动延时
- Auto: true,//是否自动转换
- Pause: 2000,//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
- };
- Object.extend(this.options, options || {});
- },
- //开始切换设置
- Start: function() {
- if(this.Index < 0){
- this.Index = this._count - 1;
- } else if (this.Index >= this._count){ this.Index = 0; }
- this._target = -1 * this._parameter * this.Index;
- this.onStart();
- this.Move();
- },
- //移动
- Move: function() {
- clearTimeout(this._timer);
- var oThis = this, style = this.Up ? "top" : "left", iNow = parseInt(this._slider.style[style]) || 0, iStep = this.GetStep(this._target, iNow);
- if (iStep != 0) {
- this._slider.style[style] = (iNow + iStep) + "px";
- this._timer = setTimeout(function(){ oThis.Move(); }, this.Time);
- } else {
- this._slider.style[style] = this._target + "px";
- this.onFinish();
- if (this.Auto) { this._timer = setTimeout(function(){ oThis.Index++; oThis.Start(); }, this.Pause); }
- }
- },
- //获取步长
- GetStep: function(iTarget, iNow) {
- var iStep = (iTarget - iNow) / this.Step;
- if (iStep == 0) return 0;
- if (Math.abs(iStep) < 1) return (iStep > 0 ? 1 : -1);
- return iStep;
- },
- //停止
- Stop: function(iTarget, iNow) {
- clearTimeout(this._timer);
- this._slider.style[this.Up ? "top" : "left"] = this._target + "px";
- }
- };
- window.onload=function(){
- function Each(list, fun){
- for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); }
- };
- var objs2 = $("idNum2").getElementsByTagName("li");
- var tv2 = new TransformView("idTransformView2", "idSlider2", 625, tpz, {
- onStart: function(){ Each(objs2, function(o, i){ o.className = tv2.Index == i ? "on" : ""; }) },//按钮样式
- Up: false
- });//6是轮播总数
- tv2.Start();
- Each(objs2, function(o, i){
- o.onmouseover = function(){
- o.className = "on";
- tv2.Auto = false;
- tv2.Index = i;
- tv2.Start();
- }
- o.onmouseout = function(){
- o.className = "";
- tv2.Auto = true;
- tv2.Start();
- }
- })
- }
- </script>
原文地址:http://www.freejs.net/article_jquerytupiantexiao_688.html