新聞廣告圖片滾動展示

在做門戶網站時，首頁面上經常會有新聞圖片類的展示，下面收集兩個圖片展示的方式：

方法1.顯示多個圖片，橫行滾動

  JS代碼如下：

  <mce:script type="text/javascript"><!-- //offsetWidth 對象的可見寬度，包滾動條等邊線，會隨窗口的顯示大小改變 //scrollLeft:設置或獲取位於對象左邊界和窗口中目前可見內容的最左端之間的距離 //setInterval() 方法可按照指定的週期（以毫秒計）來調用函數或計算表達式。 　　 //setInterval() 方法會不停地調用函數，直到 clearInterval() 被調用或窗口被關閉。 //由 setInterval() 返回的 ID 值可用作 clearInterval() 方法的參數。 var MyMar; function setImgMarquee() { if (demo1.offsetWidth > demo.offsetWidth) { demo2.innerHTML = demo1.innerHTML; MyMar = setInterval(Marquee, speed) demo.onmouseout = function () { MyMar = setInterval(Marquee, speed) } demo.onmouseover = function () { clearInterval(MyMar) } } } var speed = 50 function Marquee() { if (demo2.offsetWidth - demo.scrollLeft <= 0) demo.scrollLeft -= demo1.offsetWidth else { demo.scrollLeft++ } } // --></mce:script>

  頁面代碼如下：

  <div id="demo" style="width: 400px; height: 98px; border: solid 1px #3CACED; overflow: hidden"> <table cellspacing="0" cellpadding="0" width="97%" align="center" border="0"> <tr> <td id="demo1" runat="server"> <table cellspacing="0" cellpadding="0" border="0"> <tr> <td valign="top"> <img alt="" style="height: 98px; width: 110px;" src="img/1.jpg" mce_src="img/1.jpg" border="0" /></td> <td valign="top"> <img alt="" style="height: 98px; width: 110px;" src="img/2.jpg" mce_src="img/2.jpg" border="0" /></td> <td valign="top"> <img alt="" style="height: 98px; width: 110px;" src="img/3.jpg" mce_src="img/3.jpg" border="0" /></td> <td valign="top"> <img alt="" style="height: 98px; width: 110px;" src="img/4.jpg" mce_src="img/4.jpg" border="0" /></td> <td valign="top"> <img alt="" style="height: 98px; width: 110px;" src="img/5.jpg" mce_src="img/5.jpg" border="0" /></td> <td valign="top"> <img alt="" style="height: 98px; width: 110px;" src="img/6.jpg" mce_src="img/6.jpg" border="0" /></td> <td valign="top"> <img alt="" style="height: 98px; width: 110px;" src="img/7.jpg" mce_src="img/7.jpg" border="0" /></td> </tr> </table> </td> <td id="demo2" style="width: 0px"> </td> </tr> </table> </div>

 效果圖如下：

   

 JS代碼中設置的速度爲50,上面的圖片會按着此速度從右往左移動。

方法2.顯示一張圖片，圖層上面有固定圖片數碼，類似於翻頁功能。頁面代碼如下：

<mce:style type="text/css"><!-- BODY { PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px } UL { PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px } .container { WIDTH: 610px; HEIGHT: 305px } .container A IMG { WIDTH: 610px; HEIGHT: 305px } .container IMG { BORDER-BOTTOM-STYLE: none; BORDER-RIGHT-STYLE: none; BORDER-TOP-STYLE: none; BORDER-LEFT-STYLE: none } .td_f A IMG { PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px } .num { POSITION: absolute; WIDTH: 90px; FLOAT: right; TOP: 280px; LEFT: 520px } .num LI { TEXT-ALIGN: center; LINE-HEIGHT: 15px; LIST-STYLE-TYPE: none; MARGIN: 1px; WIDTH: 15px; FONT-FAMILY: Arial; BACKGROUND: url() no-repeat -15px 0px; FLOAT: left; HEIGHT: 15px; COLOR: #408844; FONT-SIZE: 12px; CURSOR: pointer } .num LI.on { LINE-HEIGHT: 15px; WIDTH: 15px; BACKGROUND: url() no-repeat; HEIGHT: 15px; COLOR: #ffffff } .more { FLOAT: right } .more1 A { TEXT-ALIGN: left; LINE-HEIGHT: 25px; MARGIN: 0px 0px 0px 10px; COLOR: #3373a3 } --></mce:style><style type="text/css" mce_bogus="1"> BODY { PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px } UL { PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px } .container { WIDTH: 610px; HEIGHT: 305px } .container A IMG { WIDTH: 610px; HEIGHT: 305px } .container IMG { BORDER-BOTTOM-STYLE: none; BORDER-RIGHT-STYLE: none; BORDER-TOP-STYLE: none; BORDER-LEFT-STYLE: none } .td_f A IMG { PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; PADDING-TOP: 0px } .num { POSITION: absolute; WIDTH: 90px; FLOAT: right; TOP: 280px; LEFT: 520px } .num LI { TEXT-ALIGN: center; LINE-HEIGHT: 15px; LIST-STYLE-TYPE: none; MARGIN: 1px; WIDTH: 15px; FONT-FAMILY: Arial; BACKGROUND: url() no-repeat -15px 0px; FLOAT: left; HEIGHT: 15px; COLOR: #408844; FONT-SIZE: 12px; CURSOR: pointer } .num LI.on { LINE-HEIGHT: 15px; WIDTH: 15px; BACKGROUND: url() no-repeat; HEIGHT: 15px; COLOR: #ffffff } .more { FLOAT: right } .more1 A { TEXT-ALIGN: left; LINE-HEIGHT: 25px; MARGIN: 0px 0px 0px 10px; COLOR: #3373a3 }</style> <mce:script type="text/javascript" language="javascript"><!-- if(typeof(pgvMain) == 'function') pgvMain(); // --></mce:script> <mce:script type="text/javascript" language="javascript"><!-- var gtopTab="one"; function $id(id){ return document.getElementById(id); } function changesTab(tab_id){ if (tab_id==gtopTab){ return; }else{ $id(gtopTab).className="unselect"; $id(tab_id).className="select"; $id("tab_"+gtopTab).style.display="none"; $id("tab_"+tab_id).style.display="block"; gtopTab=tab_id; } } // --></mce:script> <mce: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 * ((t=t/d-1)*t*t*t - 1) + b; } }, Back: { easeOut: function(t,b,c,d,s){ if (s == undefined) s = 1.70158; return c*((t=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; } } } } //容器對象,滑動對象,切換數量 var SlideTrans = function(container, slider, count, options) { this._slider = $(slider); this._container = $(container);//容器對象 this._timer = null;//定時器 this._count = Math.abs(count);//切換數量 this._target = 0;//目標值 this._t = this._b = this._c = 0;//tween參數 this.Index = 0;//當前索引 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); this.Tween = this.options.Tween; this.onStart = this.options.onStart; this.onFinish = this.options.onFinish; var bVertical = !!this.options.Vertical; this._css = bVertical ? "top" : "left";//方向 //樣式設置 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"; this.Change = this.options.Change ? this.options.Change : this._slider[bVertical ? "offsetHeight" : "offsetWidth"] / this._count; }; SlideTrans.prototype = { //設置默認屬性 SetOptions: function(options) { this.options = {//默認值 Vertical: true,//是否垂直方向（方向不能改） Auto: true,//是否自動 Change: 0,//改變量 Duration: 50,//滑動持續時間 Time: 10,//滑動延時 Pause: 4000,//停頓時間(Auto爲true時有效) onStart: function(){},//開始轉換時執行 onFinish: function(){},//完成轉換時執行 Tween: Tween.Quart.easeOut//tween算子 }; Extend(this.options, options || {}); }, //開始切換 Run: function(index) { //修正index index == undefined && (index = this.Index); index < 0 && (index = this._count - 1) || index >= this._count && (index = 0); //設置參數 this._target = -Math.abs(this.Change) * (this.Index = index); this._t = 0; this._b = parseInt(CurrentStyle(this._slider)[this.options.Vertical ? "top" : "left"]); this._c = this._target - this._b; this.onStart(); this.Move(); }, //移動 Move: function() { clearTimeout(this._timer); //未到達目標繼續移動否則進行下一次滑動 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)); } }, //移動到 MoveTo: function(i) { this._slider.style[this._css] = i + "px"; }, //下一個 Next: function() { this.Run(++this.Index); }, //上一個 Previous: function() { this.Run(--this.Index); }, //停止 Stop: function() { clearTimeout(this._timer); this.MoveTo(this._target); } }; // --></mce:script> </head> <body> <div id="idContainer2" class="container"> <table id="idSlider2" border="0" cellspacing="0" cellpadding="0"> <tbody> <tr> <td class="td_f"> <a οnclick="pgvSendClick({hottag:'ISD.SHOW.BANNER.SOFTMGR'});" href="#" mce_href="#"> <img alt="" src="img/01.jpg" mce_src="img/01.jpg" /></a></td> <td class="td_f"> <a οnclick="pgvSendClick({hottag:'ISD.SHOW.BANNER.PY'});" href="#" mce_href="#"> <img alt="" src="img/02.jpg" mce_src="img/02.jpg" /></a></td> <td class="td_f"> <a οnclick="pgvSendClick({hottag:'ISD.SHOW.BANNER.PLAYER'});" href="#" mce_href="#"> <img alt="" src="img/03.jpg" mce_src="img/03.jpg" /></a></td> <td class="td_f"> <a οnclick="pgvSendClick({hottag:'ISD.SHOW.BANNER.XF'});" href="#" mce_href="#"> <img alt="" src="img/04.jpg" mce_src="img/04.jpg" /></a></td> <td class="td_f"> <a οnclick="pgvSendClick({hottag:'ISD.SHOW.BANNER.TT'});" href="#" mce_href="#"> <img alt="" src="img/05.jpg" mce_src="img/05.jpg" /></a></td> </tr> </tbody> </table> <ul id="idNum" class="num"> </ul> </div> <mce:script type="text/javascript"><!-- //new SlideTrans("idContainer", "idSlider", 3).Run(); /////////////////////////////////////////////////////////// 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", 5, { Vertical: false }); var nums = []; //插入數字 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(); } }) //設置按鈕樣式 st.onStart = function(){ forEach(nums, function(o, i){ o.className = st.Index == i ? "on" : ""; }) } st.Run(); // --></mce:script> </body> </html>

 效果顯示如下：

 

 其中圖片大小格式和頁碼樣式，可以在樣式和JS代碼中調，注意，此顯示爲固定數值的圖片。其中body上下兩部分JS代碼因爲頁面加載順序的不同不可調換。在頁面中初始化幾張圖片，在body下面代碼 new SlideTrans()中要對應圖片數。