提示：您可以先修改部分代碼再運行
<!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=utf-8" /><title>js照片牆一多執行個體示範（物件導向版）</title><style type="text/css">body,div,h2,ul,li{margin:0;padding:0;}body{font:12px/1.5 Arail;}.box{width:860px;margin:10px auto;background:#eee;border:1px solid #b8b8b8;overflow:hidden}.title{height:30px;line-height:30px;font-size:14px;padding:0 15px 0 35px;border-bottom:1px solid #b8b8b8;background:#fafafa url(img/photo/ico.gif) 5px 50% no-repeat;}.title span{float:left;}.title a{float:right;color:#06f;outline:none;}.title a:hover{color:red;}.box ul{float:left;padding:0 15px 15px 0;}.box li{float:left;width:140px;height:105px;padding:6px;background:#fff;border:1px solid #c3c3c3;display:inline;margin:15px 0 0 15px;list-style:none;}.box li img{float:left;width:140px;height:105px;}.box li.hig{padding:5px;border:2px dashed #f30;opacity:0.5;filter:alpha(opacity=50);}</style><script type="text/javascript">//擷取IDvar $ = function (id) {return typeof id === "string" ? document.getElementById(id) : id};//擷取tagNamevar $$ = function (tagName, oParent) {return (oParent || document).getElementsByTagName(tagName)};//擷取classvar $$$ = function (sClass, oParent) {var aClass = [],i = 0,reClass = new RegExp("(\s|^)" + sClass + "($|\s)"),aElement = $$("*", oParent);for (i = 0; i < aElement.length; i++)reClass.test(aElement[i].className) && aClass.push(aElement[i]);return aClass};//擷取元素位置function getPos(obj) {var iTop = obj.offsetTop;var iLeft = obj.offsetLeft;while (obj.offsetParent){iTop += obj.offsetParent.offsetTop;iLeft += obj.offsetParent.offsetLeft;obj = obj.offsetParent;}return {top:iTop, left:iLeft}};//建立照片牆對象var PhotoWall = function () {this.initialize.apply(this, arguments)};PhotoWall.prototype = {initialize: function (obj, aData){var oThis = this;this.oParent = $(obj);this.oUl = $$("ul", this.oParent)[0];this.oBtn = $$("a", this.oParent)[0];this.zIndex = 1;this.aPos = [];this.aData = aData;this.dom = document.documentElement || document.body;this.create();this.oBtn.onclick = function () {oThis.randomOrder()}},create: function (){var aFrag = document.createDocumentFragment();var i = 0;for (i = 0; i < this.aData.length; i++){var oLi = document.createElement("li");var oImg = document.createElement("img");oImg.src = this.aData[i];oLi.appendChild(oImg);aFrag.appendChild(oLi)}this.oUl.appendChild(aFrag);this.aLi = $$("li", this.oParent);this.changeLayout()},changeLayout: function (){var i = 0;this.oParent.style.height = this.oParent.offsetHeight - 2 + "px";this.aPos.length = 0;for (i = 0; i < this.aLi.length; i++) this.aLi[i].style.cssText = "";for (i = 0; i < this.aLi.length; i++){this.aLi[i].index = i;this.aLi[i].style.top = getPos(this.aLi[i]).top + "px";this.aLi[i].style.left = getPos(this.aLi[i]).left + "px";this.aPos.push({left:getPos(this.aLi[i]).left, top:getPos(this.aLi[i]).top})}for (i = 0; i < this.aLi.length; i++){this.aLi[i].style.position = "absolute";this.aLi[i].style.margin = "0";this.drag(this.aLi[i])}},drag: function (obj, handle){var oThis = this;var handle = handle || obj;handle.style.cursor = "move";handle.onmousedown = function (event){var event = event || window.event;var disX = event.clientX - this.offsetLeft;var disY = event.clientY - this.offsetTop;var oNear = null;handle.style.zIndex = oThis.zIndex++;document.onmousemove = function (event){var event = event || window.event;var iL = event.clientX - disX;var iT = event.clientY - disY;var maxL = Math.max(oThis.dom.clientWidth, oThis.dom.scrollWidth) - handle.offsetWidth;var maxT = Math.max(oThis.dom.clientHeight, oThis.dom.scrollHeight) - handle.offsetHeight;iL < 0 && (iL = 0);iT < 0 && (iT = 0);iL > maxL && (iL = maxL);iT > maxT && (iT = maxT);handle.style.left = iL + "px";handle.style.top = iT + "px";oNear = oThis.findNearest(obj);for (var i = 0; i < oThis.aLi.length; i++) oThis.aLi[i].className = "";oNear && (oNear.className = "hig");return false};document.onmouseup = function (){document.onmousemove = null;document.onmouseup = null;if (oNear){handle.index = [handle.index, oNear.index];oNear.index = handle.index[0];handle.index = handle.index[1];oNear.style.zIndex = oThis.zIndex++;oThis.doMove(handle, oThis.aPos[handle.index]);oThis.doMove(oNear, oThis.aPos[oNear.index]);oNear.className = "";}else{oThis.doMove(handle, oThis.aPos[handle.index])}handle.releaseCapture && handle.releaseCapture()};this.setCapture && this.setCapture();return false};},doMove: function (obj, iTarget, callback){var oThis = this;clearInterval(obj.timer);obj.timer = setInterval(function (){var iCurL = getPos(obj).left;var iCurT = getPos(obj).top;var iSpeedL = (iTarget.left - iCurL) / 5;var iSpeedT = (iTarget.top - iCurT) / 5;iSpeedL = iSpeedL > 0 ? Math.ceil(iSpeedL) : Math.floor(iSpeedL);iSpeedT = iSpeedT > 0 ? Math.ceil(iSpeedT) : Math.floor(iSpeedT);if (iCurL == iTarget.left && iCurT == iTarget.top){clearInterval(obj.timer);callback && callback()}else{obj.style.left = iCurL + iSpeedL + "px";obj.style.top = iCurT + iSpeedT + "px"}}, 30)},findNearest: function (obj){var aDistance = [];var i = 0;for (i = 0; i < this.aLi.length; i++) aDistance[i] = this.aLi[i] == obj ? Number.MAX_VALUE : this.getDistance(obj, this.aLi[i]);var minNum = Number.MAX_VALUE;var minIndex = -1;for (i = 0; i < aDistance.length; i++) aDistance[i] < minNum && (minNum = aDistance[i], minIndex = i);return this.isButt(obj, this.aLi[minIndex]) ? this.aLi[minIndex] : null},getDistance: function(obj1, obj2){var a = (obj1.offsetLeft + obj1.offsetWidth / 2) - (obj2.offsetLeft + obj2.offsetWidth / 2);var b = (obj1.offsetTop + obj1.offsetTop / 2) - (obj2.offsetTop + obj2.offsetTop / 2);return Math.sqrt(a * a + b * b)},isButt: function (obj1, obj2){var l1 = obj1.offsetLeft;var t1 = obj1.offsetTop;var r1 = l1 + obj1.offsetWidth;var b1 = t1 + obj1.offsetHeight;var l2 = obj2.offsetLeft;var t2 = obj2.offsetTop;var r2 = l2 + obj2.offsetWidth;var b2 = t2 + obj2.offsetHeight;return !(r1 < l2 || b1 < t2 || r2 < l1 || b2 < t1)},randomOrder: function (){this.aPos.sort(function () {return Math.random() > 0.5 ? 1 : -1});for (var i = 0; i < this.aLi.length; i++){this.aLi[i].index = i;this.doMove(this.aLi[i], this.aPos[i])}}};window.onload = function (){var aBox = $$$("box");var aData = [];var aExample = [];var i = 0;//產生圖片資料for (i = 0; i < 20; i++) aData[aData.length] = "img/photo/" + i + ".jpg";//迴圈建立多個執行個體for (i = 0; i < aBox.length; i++){var oExample = new PhotoWall(aBox[i], aData);aExample.push(oExample)}this.onresize = function (){for (var p in aExample) aExample[p].changeLayout()};this.onresize()};</script></head><body><div class="box"> <h2 class="title"><span>一堆90後</span>隨機排序</h2> <ul></ul></div><div class="box"> <h2 class="title"><span>一堆90後</span>隨機排序</h2> <ul></ul></div></body></html></td> </tr></table>
提示：您可以先修改部分代碼再運行
