JavaScript实现AJAX的拖动效果-例子2

< 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 >