拖放图层区域受限制特效-JS特效-爱易网页

拖放图层区域受限制特效

日期：2014-05-18　浏览次数：20182 次

以下是程序代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-Type" content="text/html;charset=gb2312">
<meta name="keywords" content="站长,网页特效,js特效,js脚本,脚本,广告代码,zzjs,zzjs.net,sky,www.zzjs.net,站长特效 网" />
<meta name="description" content="www.zzjs.net,站长特效网，站长必备js特效及广告代码。大量高质量js特效，提供高质量广告代码下载,尽在站长特效网" />
<title>网页特效 限制区域的可拖放层 站长特效网</title>
<style type="text/css">
body{
 margin:auto;
 font-size:12px;
}
.www_zzjs_net {
 width: 300px;
 margin:13px auto 13px auto;
 min-height: 200px;
 padding: 2px;
 border: 1px solid #666666;
 background: #FFFFFF;
}
.www_zzjs_net h1 {
 width: 300px;
 height: 25px;
 margin: 0px;
 line-height: 25px;
 font-size: 14px;
 background-color: #CCC;
}
</style>
<script type="text/javascript">
/**
 * eDrag 层拖曳javascript类
 * eDrag.proxy("拖曳层","标题","可以扔下的容器");
 * eDrag.init();
 *
 *
 * @author Eays
 * @version 1.1
 */
var EDrag = _EDrag = {
 wraps: [],
 titles: [],
 target: [],
 document: document.documentElement || document.body,
 initialPosition: {x:0 ,y:0},
 dragArea: null,
 dragAreaCopy: null,
 dragParent: null,
 mouseOffset: 0,
 dragAreaId: null,
 releaseTarget: null,
 init: function()
 {
  this.style.loadStyle();
  for (var i = 0 ; i < this.titles.length ; i++)
  {
   var title = EF.get(this.wraps[i] , this.titles[i]);
   if(!title.releaseTarget)
    title.releaseTarget = this.target[i];
   title.onmousedown = this.down;
  }
  document.onmousemove = this.move;
  document.onmouseup = this.up;
 },
 proxy : function(area , drag , target)
 {
  this.wraps.push(area);
  this.titles.push(drag);
  target = target == undefined ? null : target;
  this.target.push(target);
 },
 down: function (e){
  e = EF.event(e);
  current = e.srcElement || e.target;
  EDrag.dragArea = EF.get( EF.getDragArea(current) );
  if(EDrag.dragArea){
   //记录下拖拽对象原始位置
   EDrag.initialPosition = EDrag.dragArea.position();
   //创建一个原对象的影子
   EDrag.hadow = EDrag.fun.createShadow(EDrag.dragArea);
   // 用影子替换原有对象并清空对象
   EDrag.dragArea = EDrag.dragArea.parentNode.replaceChild(EDrag.hadow , EDrag.dragArea);
   EDrag.hadow.html("");
   // 将原对象设为绝对
   EDrag.dragArea.setStyle("position" , "absolute");
   EDrag.dragArea.setStyle("left" , EDrag.initialPosition.x + "px");
   EDrag.dragArea.setStyle("top" , EDrag.initialPosition.y + "px");
   EDrag.dragAreaId = EDrag.dragArea.id;
   EDrag.dragAreaCopy = EDrag.dragArea.copy();
   EDrag.dragArea.setStyle("filter" , "alpha(opacity=70)");
   EDrag.dragArea.setStyle("opacity" , "0.7");
   EDrag.dragAreaCopy.hidden();
   EDrag.dragAreaCopy.setStyle("position" , "absolute");
   EDrag.dragArea.setStyle("margin" , "auto");
   // 添加原对象在文档未尾
   EDrag.document.lastChild.appendChild(EDrag.dragArea);
   // 鼠标的相对位置
   EDrag.mouseOffset = e.offset(EDrag.initialPosition);
   //保存release目标
   EDrag.releaseTarget = current.releaseTarget;
   EDrag.move(e);
  }
 },
 move: function(e)
 {
  if(!EDrag.dragArea)
   return false;
  e = EF.event(e);
  var position = e.offset(EDrag.mouseOffset);
  if(position.x >= 0 && position.x <= EDrag.document.offsetWidth - EDrag.dragArea.offsetWidth)
   EDrag.dragArea.setStyle("left" , position.x +"px");
  if(position.y >= 0)
   EDrag.dragArea.setStyle("top" , position.y +"px");
  //遍厉目标对象所有子节点，给出拖曳层的目标层
  for(var i in EDrag.releaseTar</div></div>

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