原生JS编写的照片墙效果实例演示特效-JS特效-爱易网页

原生JS编写的照片墙效果实例演示特效

日期：2014-05-18　浏览次数：20393 次

以下是程序代码

<!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>照片墙一多实例演示</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(http://js.aiyiweb.com/img/mm/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">
//获取ID
var $ = function (id) {return typeof id === "string" ? document.getElementById(id) : id};
//获取tagName
var $$ = function (tagName, oParent) {return (oParent || document).getElementsByTagName(tagName)};
//获取class
var $$$ = function (sClass, oParent) {
 var aClass = [],
 i = 0,
 reClass = new RegExp("(\\s|^)" + sClass + "($|\\s)"),
 aElement = $$("*", oParent);
 for (i = 0; i < aElement.length; i++)reClass.test(aElement[i].className) && aClass.push(aElement[i]);
 return aClass
};
//获取元素位置
function getPos(obj) {
 var iTop = obj.offsetTop;
 var iLeft = obj.offsetLeft;
 while (obj.offsetParent)
 {
  iTop += obj.offsetParent.offsetTop;
  iLeft += obj.offsetParent.offsetLeft;
  obj = obj.offsetParent;
 }
 return {top:iTop, left:iLeft} 
};
//创建照片墙对象
var PhotoWall = function () {this.initialize.apply(this, arguments)};
PhotoWall.prototype = {
 initialize: function (obj, aData)
 {
  var oThis = this;
  this.oParent = $(obj);
  this.oUl = $$("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 = "</div></div>

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