本文实例讲述了JavaScript实现图片DIV竖向滑动的方法。分享给大家供大家参考。具体实现方法如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>图片滑动展示效果</title><script type="text/javascript">var $$ = function (id) {return "string" == typeof id ? document.getElementById(id) : id;};function Event(e){var oEvent = document.all ? window.event : e;if (document.all) {if(oEvent.type == "mouseout") {oEvent.relatedTarget = oEvent.toElement;}else if(oEvent.type == "mouseover") {oEvent.relatedTarget = oEvent.fromElement;}}return oEvent;}function addEventHandler(oTarget, sEventType, fnHandler) {if (oTarget.addEventListener) {oTarget.addEventListener(sEventType, fnHandler, false);} else if (oTarget.attachEvent) {oTarget.attachEvent("on" + sEventType, fnHandler);} else {oTarget["on" + sEventType] = fnHandler;}};var Class = {create: function() {return function() {this.initialize.apply(this, arguments);}}}Object.extend = function(destination, source) {for (var property in source) {destination[property] = source[property];}return destination;}var GlideView = Class.create();GlideView.prototype = {//容器对象 容器宽度 展示标签 展示宽度initialize: function(obj, iHeight, sTag, iMaxHeight, options) {var oContainer = $$(obj), oThis=this, len = 0;this.SetOptions(options);this.Step = Math.abs(this.options.Step);this.Time = Math.abs(this.options.Time);this._list = oContainer.getElementsByTagName(sTag);len = this._list.length;this._count = len;this._height = parseInt(iHeight / len);this._height_max = parseInt(iMaxHeight);this._height_min = parseInt((iHeight - this._height_max) / (len - 1));this._timer = null;this.Each(function(oList, oText, i){oList._target = this._height * i;//自定义一个属性放目标leftoList.style.top = oList._target + "px";oList.style.position = "absolute";addEventHandler(oList, "mouseover", function(){ oThis.Set.call(oThis, i); });})//容器样式设置oContainer.style.height = iHeight + "px";oContainer.style.overflow = "hidden";oContainer.style.position = "relative";//移出容器时返回默认状态addEventHandler(oContainer, "mouseout", function(e){//变通防止执行oList的mouseoutvar o = Event(e).relatedTarget;if (oContainer.contains ? !oContainer.contains(o) : oContainer != o && !(oContainer.compareDocumentPosition(o) & 16)) oThis.Set.call(oThis, -1);})},//设置默认属性SetOptions: function(options) {this.options = {//默认值Step:20,//滑动变化率Time:3,//滑动延时TextTag:"",//说明容器tagTextHeight: 0//说明容器高度};Object.extend(this.options, options || {});},//相关设置Set: function(index) {if (index < 0) {//鼠标移出容器返回默认状态this.Each(function(oList, oText, i){ oList._target = this._height * i; if(oText){ oText._target = this._height_text; } })} else {//鼠标移到某个滑动对象上this.Each(function(oList, oText, i){oList._target = (i <= index) ? this._height_min * i : this._height_min * (i - 1) + this._height_max;if(oText){ oText._target = (i == index) ? 0 : this._height_text; }})}this.Move();},//移动Move: function() {clearTimeout(this._timer);var bFinish = true;//是否全部到达目标地址this.Each(function(oList, oText, i){var iNow = parseInt(oList.style.top), iStep = this.GetStep(oList._target, iNow);if (iStep != 0) { bFinish = false; oList.style.top = (iNow + iStep) + "px"; }})//未到达目标继续移动if (!bFinish) { var oThis = this; this._timer = setTimeout(function(){ oThis.Move(); }, this.Time); }},//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;},Each:function(fun) {for (var i = 0; i < this._count; i++)fun.call(this, this._list[i], (this.Showtext ? this._text[i] : null), i);}};</script><style type="text/css">#idGlideView {height:314px;width:325px;margin:0 auto;}#idGlideView div {width:325px;height:314px;}</style></head><body><div id="idGlideView"><div style="background-color:#006699;"> 鼠标移到这里试试看！</div><div style="background-color:#FF9933;"> 鼠标移到这里试试看！</div></div><div>//www.VeVB.COm/</div><SCRIPT>var gv = new GlideView("idGlideView", 314, "div", 280,"");</SCRIPT></body></html>希望本文所述对大家的javascript程序设计有所帮助。
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