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DIV任意拖动的问题

发布：dxy 字体：[增加减小] 类型：转载

点击运行可以看到效果:

<html>
<head>
<title>DRAG the DIV</title>
<style>
*{font-size:12px}
.dragTable{
 font-size:12px;
 border-top:1px solid #3366cc;
 margin-bottom: 10px;
 width:100%;
 background-color:#FFFFFF;
}
.dragTR{
 cursor:move;
 color:#7787cc;
 background-color:#e5eef9;
}
td{vertical-align:top;}
#parentTable{
 border-collapse:collapse;
 letter-spacing:25px;
}
</style>
<script defer>
/****JoeLee************E-MAIL:hktx@163.com****QQ:48293707*****11:09 2006-2-9******/
 var draged=false;
 tdiv=null;
function dragStart(){
 ao=event.srcElement;
 if((ao.tagName=="TD")||(ao.tagName=="TR"))ao=ao.offsetParent;
 else return;
 draged=true;
 tdiv=document.createElement("div");
 tdiv.innerHTML=ao.outerHTML;
 tdiv.style.display="block";
 tdiv.style.position="absolute";
 tdiv.style.filter="alpha(opacity=70)";
 tdiv.style.cursor="move";
 tdiv.style.width=ao.offsetWidth;
 tdiv.style.height=ao.offsetHeight;
 tdiv.style.top=getInfo(ao).top;
 tdiv.style.left=getInfo(ao).left;
 document.body.appendChild(tdiv);
 lastX=event.clientX;
 lastY=event.clientY;
 lastLeft=tdiv.style.left;
 lastTop=tdiv.style.top;
 try{
  ao.dragDrop(); 
 }catch(e){}
}
function draging(){//重要:判断MOUSE的位置
 if(!draged)return;
 var tX=event.clientX;
 var tY=event.clientY;
 tdiv.style.left=parseInt(lastLeft)+tX-lastX;
 tdiv.style.top=parseInt(lastTop)+tY-lastY;
 for(var i=0;i<parentTable.cells.length;i++){
  var parentCell=getInfo(parentTable.cells[i]);
  if(tX>=parentCell.left&&tX<=parentCell.right&&tY>=parentCell.top&&tY<=parentCell.bottom){
   var subTables=parentTable.cells[i].getElementsByTagName("table");
   if(subTables.length==0){
    if(tX>=parentCell.left&&tX<=parentCell.right&&tY>=parentCell.top&&tY<=parentCell.bottom){
     parentTable.cells[i].appendChild(ao);
    }
    break;
   }
   for(var j=0;j<subTables.length;j++){
    var subTable=getInfo(subTables[j]);
    if(tX>=subTable.left&&tX<=subTable.right&&tY>=subTable.top&&tY<=subTable.bottom){
     parentTable.cells[i].insertBefore(ao,subTables[j]);
     break;
    }else{
     parentTable.cells[i].appendChild(ao);
    } 
   }
  }
 }
}
function dragEnd(){
 if(!draged)return;
 draged=false;
 mm=ff(150,15);
}
function getInfo(o){//取得坐标
 var to=new Object();
 to.left=to.right=to.top=to.bottom=0;
 var twidth=o.offsetWidth;
 var theight=o.offsetHeight;
 while(o!=document.body){
  to.left+=o.offsetLeft;
  to.top+=o.offsetTop;
  o=o.offsetParent;
 }
  to.right=to.left+twidth;
  to.bottom=to.top+theight;
 return to;
}
function ff(aa,ab){//从GOOGLE网站来,用于恢复位置
 var ac=parseInt(getInfo(tdiv).left);
 var ad=parseInt(getInfo(tdiv).top);
 var ae=(ac-getInfo(ao).left)/ab;
 var af=(ad-getInfo(ao).top)/ab;
 return setInterval(function(){if(ab<1){
       clearInterval(mm);
       tdiv.removeNode(true);
       ao=null;
       return
      }
     ab--;
     ac-=ae;
     ad-=af;
     tdiv.style.left=parseInt(ac)+"px";
     tdiv.style.top=parseInt(ad)+"px"
    }
,aa/ab)
}
function inint(){//初始化
 for(var i=0;i<parentTable.cells.length;i++){
  var subTables=parentTable.cells[i].getElementsByTagName("table");
  for(var j=0;j<subTables.length;j++){
   if(subTables[j].className!="dragTable")break;
   subTables[j].rows[0].className="dragTR";
   subTables[j].rows[0].attachEvent("onmousedown",dragStart);
   subTables[j].attachEvent("ondrag",draging);
   subTables[j].attachEvent("ondragend",dragEnd);
  }
 }
}
inint();
</script>
</head>
<body>
<table border="0" cellpadding="0" cellspacing="10" width="100%" height=500 id="parentTable">
<tr >
 <td width="25%" valgin="top">
  <table border=0 class="dragTable" cellspacing="0">
   <tr>
    <td><b>GMAIL</b></td>
   </tr>
   <tr>
    <td>暂时无法显示GMAIL内容</td>
   <tr>
  </table><table border=0 class="dragTable" cellspacing="0">
   <tr>
    <td>新浪体育</td>
   </tr>
   <tr>
    <td>解剖威队独门利器FW28 2万转引擎匹配超级变速器颁奖：辛吉斯欣喜能以冠军起步 印度搭档创下纪录法新社前瞻冬奥短道速滑：中韩唱主角 美加施冷箭</td>
   <tr>
  </table><table border=0 class="dragTable" cellspacing="0">
   <tr>
    <td>焦点</td>
   </tr>
   <tr>
    <td>京广线中断4小时20临客返汉晚点
中国新闻网-湖北分社 - 所有 235 相关报道 ?哈马斯已有总理人选
解放日报报业集团 - 所有 489 相关报道 ?陈水扁是两岸关系麻烦制造者
武汉晨报 - 所有 179 相关报道 ?</td>
   <tr>
  </table>
 </td>
 <td width="25%">
  <table border=0 class="dragTable" cellspacing="0">
   <tr>
    <td>中关村在线</td>
   </tr>
   <tr>
    <td>新年行情速递 双敏板卡低价推荐 终于等到了，映泰6600GT一降降一百 罗技G15游戏键盘热力促销，代购价仅529元 </td>
   <tr>
  </table></td>
 <td width="25%">
  <table border=0 class="dragTable" cellspacing="0">
   <tr>
    <td>网易商业</td>
   </tr>
   <tr>
    <td>上海GDP增幅去年出现回落应对反倾销 中国鞋企联手对抗欧盟尹家绪操盘南方汽车 长安谋求曲线整体境外上市</td>
   <tr>
  </table>
 </td>
</tr>
</table>
</body>
</html>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

div版的

点击运行可以看到效果:

left += e.offsetLeft + (e.currentStyle?(parseInt(e.currentStyle.borderLeftWidth)).NaN0():0);
 top  += e.offsetTop  + (e.currentStyle?(parseInt(e.currentStyle.borderTopWidth)).NaN0():0);
 return {x:left, y:top};
}
function mouseCoords(ev){
 if(ev.pageX || ev.pageY){
  return {x:ev.pageX, y:ev.pageY};
 }
 return {
  x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,
  y:ev.clientY + document.body.scrollTop  - document.body.clientTop
 };
}
function writeHistory(object, message){
 if(!object || !object.parentNode || !object.parentNode.getAttribute) return;
 var historyDiv = object.parentNode.getAttribute('history');
 if(historyDiv){
  historyDiv = document.getElementById(historyDiv);
  historyDiv.appendChild(document.createTextNode(object.id+': '+message));
  historyDiv.appendChild(document.createElement('BR'));
  historyDiv.scrollTop += 50;
 }
}
function getMouseOffset(target, ev){
 ev = ev || window.event;
 var docPos    = getPosition(target);
 var mousePos  = mouseCoords(ev);
 return {x:mousePos.x - docPos.x, y:mousePos.y - docPos.y};
}
function mouseMove(ev){
 ev         = ev || window.event;
 /*
 We are setting target to whatever item the mouse is currently on
 Firefox uses event.target here, MSIE uses event.srcElement
 */
 var target   = ev.target || ev.srcElement;
 var mousePos = mouseCoords(ev);
 if(Demos[0] || Demos[4]){
  // mouseOut event - fires if the item the mouse is on has changed
  if(lastTarget && (target!==lastTarget)){
   writeHistory(lastTarget, 'Mouse Out Fired');
   // reset the classname for the target element
   var origClass = lastTarget.getAttribute('origClass');
   if(origClass) lastTarget.className = origClass;
  }
  /*
  dragObj is the grouping our item is in (set from the createDragContainer function).
  if the item is not in a grouping we ignore it since it can't be dragged with this
  script.
  */
  var dragObj = target.getAttribute('DragObj');
   // if the mouse was moved over an element that is draggable
  if(dragObj!=null){
   // mouseOver event - Change the item's class if necessary
   if(target!=lastTarget){
    writeHistory(target, 'Mouse Over Fired');
    var oClass = target.getAttribute('overClass');
    if(oClass){
     target.setAttribute('origClass', target.className);
     target.className = oClass;
    }
   }
   // if the user is just starting to drag the element
   if(iMouseDown && !lMouseState){
    writeHistory(target, 'Start Dragging');
    // mouseDown target
    curTarget     = target;
    // Record the mouse x and y offset for the element
    rootParent    = curTarget.parentNode;
    rootSibling   = curTarget.nextSibling;
    mouseOffset   = getMouseOffset(target, ev);
    // We remove anything that is in our dragHelper DIV so we can put a new item in it.
    for(var i=0; i<dragHelper.childNodes.length; i++) dragHelper.removeChild(dragHelper.childNodes[i]);
    // Make a copy of the current item and put it in our drag helper.
    dragHelper.appendChild(curTarget.cloneNode(true));
    dragHelper.style.display = 'block';
    // set the class on our helper DIV if necessary
    var dragClass = curTarget.getAttribute('dragClass');
    if(dragClass){
     dragHelper.firstChild.className = dragClass;
    }
    // disable dragging from our helper DIV (it's already being dragged)
    dragHelper.firstChild.removeAttribute('DragObj');
    /*
    Record the current position of all drag/drop targets related
    to the element.  We do this here so that we do not have to do
    it on the general mouse move event which fires when the mouse
    moves even 1 pixel.  If we don't do this here the script
    would run much slower.
    */
    var dragConts = DragDrops[dragObj];
    /*
    first record the width/height of our drag item.  Then hide it since
    it is going to (potentially) be moved out of its parent.
    */
    curTarget.setAttribute('startWidth',  parseInt(curTarget.offsetWidth));
    curTarget.setAttribute('startHeight', parseInt(curTarget.offsetHeight));
    curTarget.style.cssText = 'FILTER:alpha(opacity=20);border:1px dotted #ff0000';
    // loop through each possible drop container
    for(var i=0; i<dragConts.length; i++){
     with(dragConts[i]){
      var pos = getPosition(dragConts[i]);
      /*
      save the width, height and position of each container.
      Even though we are saving the width and height of each
      container back to the container this is much faster because
      we are saving the number and do not have to run through
      any calculations again.  Also, offsetHeight and offsetWidth
      are both fairly slow.  You would never normally notice any
      performance hit from these two functions but our code is
      going to be running hundreds of times each second so every
      little bit helps!
      Note that the biggest performance gain here, by far, comes
      from not having to run through the getPosition function
      hundreds of times.
      */
      setAttribute('startWidth',  parseInt(offsetWidth));
      setAttribute('startHeight', parseInt(offsetHeight));
      setAttribute('startLeft',   pos.x);
      setAttribute('startTop',    pos.y);
     }
     // loop through each child element of each container
     for(var j=0; j<dragConts[i].childNodes.length; j++){
      with(dragConts[i].childNodes[j]){
       if((nodeName=='#text') || (dragConts[i].childNodes[j]==curTarget)) continue;
       var pos = getPosition(dragConts[i].childNodes[j]);
       // save the width, height and position of each element
       setAttribute('startWidth',  parseInt(offsetWidth));
       setAttribute('startHeight', parseInt(offsetHeight));
       setAttribute('startLeft',   pos.x);
       setAttribute('startTop',    pos.y);
      }
     }
    }
   }
  }
  // If we get in here we are dragging something
  if(curTarget){
   // move our helper div to wherever the mouse is (adjusted by mouseOffset)
   dragHelper.style.top  = mousePos.y - mouseOffset.y;
   dragHelper.style.left = mousePos.x - mouseOffset.x;
   var dragConts  = DragDrops[curTarget.getAttribute('DragObj')];
   var activeCont = null;
   var xPos = mousePos.x - mouseOffset.x + (parseInt(curTarget.getAttribute('startWidth')) /2);
   var yPos = mousePos.y - mouseOffset.y + (parseInt(curTarget.getAttribute('startHeight'))/2);
   // check each drop container to see if our target object is "inside" the container
   for(var i=0; i<dragConts.length; i++){
    with(dragConts[i]){
     if((parseInt(getAttribute('startLeft'))                                           < xPos) &&
      (parseInt(getAttribute('startTop'))                                            < yPos) &&
      ((parseInt(getAttribute('startLeft')) + parseInt(getAttribute('startWidth')))  > xPos) &&
      ((parseInt(getAttribute('startTop'))  + parseInt(getAttribute('startHeight'))) > yPos)){
       /*
       our target is inside of our container so save the container into
       the activeCont variable and then exit the loop since we no longer
       need to check the rest of the containers
       */
       activeCont = dragConts[i];
       // exit the for loop
       break;
     }
    }
   }
   // Our target object is in one of our containers.  Check to see where our div belongs
   if(activeCont){
    if(activeCont!=curTarget.parentNode){
     writeHistory(curTarget, 'Moved into '+activeCont.id);
    }
    // beforeNode will hold the first node AFTER where our div belongs
    var beforeNode = null;
    // loop through each child node (skipping text nodes).
    for(var i=activeCont.childNodes.length-1; i>=0; i--){
     with(activeCont.childNodes[i]){
      if(nodeName=='#text') continue;
      // if the current item is "After" the item being dragged
      if(curTarget != activeCont.childNodes[i]                                                  &&
       ((parseInt(getAttribute('startLeft')) + parseInt(getAttribute('startWidth')))  > xPos) &&
       ((parseInt(getAttribute('startTop'))  + parseInt(getAttribute('startHeight'))) > yPos)){
        beforeNode = activeCont.childNodes[i];
      }
     }
    }
    // the item being dragged belongs before another item
    if(beforeNode){
     if(beforeNode!=curTarget.nextSibling){
      writeHistory(curTarget, 'Inserted Before '+beforeNode.id);
      activeCont.insertBefore(curTarget, beforeNode);
     }
    // the item being dragged belongs at the end of the current container
    } else {
     if((curTarget.nextSibling) || (curTarget.parentNode!=activeCont)){
      writeHistory(curTarget, 'Inserted at end of '+activeCont.id);
      activeCont.appendChild(curTarget);
     }
    }
    // the timeout is here because the container doesn't "immediately" resize
   setTimeout(function(){
    var contPos = getPosition(activeCont);
    activeCont.setAttribute('startWidth',  parseInt(activeCont.offsetWidth));
    activeCont.setAttribute('startHeight', parseInt(activeCont.offsetHeight));
    activeCont.setAttribute('startLeft',   contPos.x);
    activeCont.setAttribute('startTop',    contPos.y);}, 5);
    // make our drag item visible
    if(curTarget.style.display!=''){
     writeHistory(curTarget, 'Made Visible');
     curTarget.style.display    = '';
     curTarget.style.visibility = 'visible';
    }
   } else {
    // our drag item is not in a container, so hide it.
    if(curTarget.style.display!='none'){
     writeHistory(curTarget, 'Hidden');
     curTarget.style.display  = 'none';
    }
   }
  }
  // track the current mouse state so we can compare against it next time
  lMouseState = iMouseDown;
  // mouseMove target
  lastTarget  = target;
 }
 if(Demos[2]){
  document.getElementById('MouseXPosition').value = mousePos.x;
  document.getElementById('MouseYPosition').value = mousePos.y;
 }
 if(dragObject){
  dragObject.style.position = 'absolute';
  dragObject.style.top      = mousePos.y - mouseOffset.y;
  dragObject.style.left     = mousePos.x - mouseOffset.x;
 }
 // track the current mouse state so we can compare against it next time
 lMouseState = iMouseDown;
 // this prevents items on the page from being highlighted while dragging
 if(curTarget || dragObject) return false;
}
function mouseUp(ev){
 if(Demos[0] || Demos[4]){
  if(curTarget){
   writeHistory(curTarget, 'Mouse Up Fired');
   dragHelper.style.display = 'none';
   if(curTarget.style.display == 'none'){
    if(rootSibling){
     rootParent.insertBefore(curTarget, rootSibling);
    } else {
     rootParent.appendChild(curTarget);
    }
   }
   curTarget.style.display    = '';
   curTarget.style.visibility = 'visible';
   curTarget.style.cssText = 'FILTER:alpha(opacity=100);border:1px solid #000';
  }
  curTarget  = null;
 }
 if(Demos[6] && dragObject){
  ev           = ev || window.event;
  var mousePos = mouseCoords(ev);
  var dT = dragObject.getAttribute('droptarget');
  if(dT){
   var targObj = document.getElementById(dT);
   var objPos  = getPosition(targObj);
   if((mousePos.x > objPos.x) && (mousePos.y > objPos.y) && (mousePos.x<(objPos.x+parseInt(targObj.offsetWidth))) && (mousePos.y<(objPos.y+parseInt(targObj.offsetHeight)))){
    var nSrc = targObj.getAttribute('newSrc');
    if(nSrc){
     dragObject.src = nSrc;
     setTimeout(function(){
      if(!dragObject || !dragObject.parentNode) return;
      dragObject.parentNode.removeChild(dragObject);
      dragObject = null;
     }, parseInt(targObj.getAttribute('timeout')));
    } else {
     dragObject.parentNode.removeChild(dragObject);
    }
   }
  }
 }
 dragObject = null;
 iMouseDown = false;
}
function mouseDown(ev){
 ev         = ev || window.event;
 var target = ev.target || ev.srcElement;
 iMouseDown = true;
 if(Demos[0] || Demos[4]){
  if(lastTarget){
   writeHistory(lastTarget, 'Mouse Down Fired');
  }
 }
 if(target.onmousedown || target.getAttribute('DragObj')){
  return false;
 }
}
function makeDraggable(item){
 if(!item) return;
 item.onmousedown = function(ev){
  dragObject  = this;
  mouseOffset = getMouseOffset(this, ev);
  return false;
 }
}
function makeClickable(item){
 if(!item) return;
 item.onmousedown = function(ev){
  document.getElementById('ClickImage').value = this.name;
 }
}
function addDropTarget(item, target){
 item.setAttribute('droptarget', target);
}
document.onmousemove = mouseMove;
document.onmousedown = mouseDown;
document.onmouseup   = mouseUp;
window.onload = function(){
 for(var i=0; i<nDemos; i++){
  Demos[i] = document.getElementById('Demo'+i);
 }
 if(Demos[0]){
  CreateDragContainer(document.getElementById('DragContainer1'), document.getElementById('DragContainer2'), document.getElementById('DragContainer3'));
  CreateDragContainer(document.getElementById('DragContainer7'));
  CreateDragContainer(document.getElementById('DragContainer8'));
 }
 if(Demos[4]){
  CreateDragContainer(document.getElementById('DragContainer1'), document.getElementById('DragContainer2'));
 }
 if(Demos[0] || Demos[4]){
  // Create our helper object that will show the item while dragging
  dragHelper = document.createElement('DIV');
  dragHelper.style.cssText = 'position:absolute;display:none;';
  document.body.appendChild(dragHelper);
 }
 if(Demos[1]){
  makeDraggable(document.getElementById('DragImage1'));
  makeDraggable(document.getElementById('DragImage2'));
  makeDraggable(document.getElementById('DragImage3'));
  makeDraggable(document.getElementById('DragImage4'));
 }
 if(Demos[5]){
  makeDraggable(document.getElementById('DragImage5'));
  makeDraggable(document.getElementById('DragImage6'));
  makeDraggable(document.getElementById('DragImage7'));
  makeDraggable(document.getElementById('DragImage8'));
 }
 if(Demos[6]){
  makeDraggable(document.getElementById('DragImage9'));
  makeDraggable(document.getElementById('DragImage10'));
  makeDraggable(document.getElementById('DragImage11'));
  makeDraggable(document.getElementById('DragImage12'));
  addDropTarget(document.getElementById('DragImage9'),  'TrashImage1');
  addDropTarget(document.getElementById('DragImage10'), 'TrashImage1');
  addDropTarget(document.getElementById('DragImage11'), 'TrashImage1');
  addDropTarget(document.getElementById('DragImage12'), 'TrashImage1');
 }
 if(Demos[3]){
  makeClickable(document.getElementById('ClickImage1'));
  makeClickable(document.getElementById('ClickImage2'));
  makeClickable(document.getElementById('ClickImage3'));
  makeClickable(document.getElementById('ClickImage4'));
 }
}
</script>
<style>
#Demo4{margin-left:14px;}
.DragContainer {float:left;width:360px;margin:5px;padding:5px;}
.OverDragContainer {border:#ccc 2px solid;}
.DragBox {border:#000 1px solid;width:350px;height:auto;background:#eee url(../images/right_title.gif) no-repeat left top;margin-bottom:5px;padding-top:5px;}
.OverDragBox {border: #000 1px solid;width:350px;cursor:move;background:#eee url(../images/right_title.gif) no-repeat left top;;margin-bottom:5px;padding-top:5px;}
.DragDragBox {border: #000 1px solid;width:350px;cursor:move;background:#eee url(../images/right_title.gif) no-repeat left top;;margin-bottom:5px;padding-top:5px;}
.DragDragBox {FILTER:alpha(opacity=70);background:#eee url(../images/right_title.gif) no-repeat left top;}
.DragBox img{margin-left:10px;}
.DragDragBox  img{margin-left:10px;}
.OverDragBox img{margin-left:10px;}
egend {font-weight: bold;font-size:12px;color:#666699; font-family: verdana, tahoma, arial}
fieldset {padding-right:3px;padding-left:3px;padding-bottom:3px;padding-top: 3px}
.content{padding-left:8px;clear:both;height:25px;background:#fff;margin-top:5px;}
.content li{list-style:none;width:75px;line-height:25px;float:left;}
.history{background:#eee;} 
</style>
<fieldset id="Demo4"><legend>本页面元素可以随意拖拽</legend>
<div>
<div class="DragContainer" id="DragContainer1" overclass="OverDragContainer">
 
<div class="DragBox" overclass="OverDragBox" dragclass="DragDragBox">
顶级站点
<div class="content" id="hot_content">
<li><a  href="http://www.sohu.com/" target="_blank">搜狐</a></li>
<li><a href="http://www.sina.com.cn/" target="_blank">新浪</a></li>
<li><a href="http://www.163.com/" target="_blank">网易</a></li>
<li><a href="http://www.qq.com/" target="_blank">腾讯QQ</a></li>
<li><a href="http://www.tom.com/" target="_blank">TOM</a></li>
<li><a href="http://www.china.com/" target="_blank">中华网</a></li>
<li><a  href="http://www.21cn.com/" target="_blank">21CN</a></li>
<li><a href="http://www.sogou.com/" target="_blank">搜狗</a></li>
<li><a href="http://www.google.com/intl/zh-CN/" target="_blank">Google</a></li>
<li><a  href="http://www.baidu.com/" target="_blank">百度</a></li>
<li><a  href="http://www.yahoo.com.cn/" target="_blank">雅虎</a></li>
<li><a  href="http://www.msn.com.cn/" target="_blank">MSN中国</a></li>
</div>
</div>
<div class="DragBox" id="Item2" overclass="OverDragBox" dragclass="DragDragBox">Item #2
欢迎您来到<a href="http://www.achome.cn">www.achome.cn</a>,以后要常来噢</div>
<div class=DragBox id=Item3 overclass="OverDragBox" dragclass="DragDragBox">Item #3</div>
<div class=DragBox id=Item4 overclass="OverDragBox" dragclass="DragDragBox">Item #4</div>
</div>
      
      
<div class="DragContainer" id="DragContainer2"  overclass="OverDragContainer">
<div class="DragBox" id=Item5 overclass="OverDragBox" dragclass="DragDragBox">Item #5</div>
<div class="DragBox" id=Item6 overclass="OverDragBox" dragclass="DragDragBox">Item #6</div>
 </div>
      
</div>
</fieldset>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

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