现在网上实现表格拖放效果的网页很多，可是究竟是怎么实现的呢？今天把一段简单是实现代码贴出来，供大家参考！

<style>
*{font-size:12px}
.dragTable{
font-size:12px;
margin-bottom:5px;
}
td{vertical-align:top;}
.dragTR{
cursor:move;
color:#7787cc;
background-color:#e5eef9;
height:20px;
padding-left:5px;
font-weight:bold;
}
#parentTable{
border-collapse:collapse;
letter-spacing:25px;
}
</style>
<scriptdefer>
varDrag={dragged:false,
ao:null,
tdiv:null,
dragStart:function(){
Drag.ao=event.srcElement;
if((Drag.ao.tagName==\"TD\")||(Drag.ao.tagName==\"TR\")){
Drag.ao=Drag.ao.offsetParent;
Drag.ao.style.zIndex=100;
}else
return;
Drag.dragged=true;
Drag.tdiv=document.createElement(\"div\");
Drag.tdiv.innerHTML=Drag.ao.outerHTML;
Drag.ao.style.border=\"1pxdashedred\";
Drag.tdiv.style.display=\"block\";
Drag.tdiv.style.position=\"absolute\";
Drag.tdiv.style.filter=\"alpha(opacity=70)\";
Drag.tdiv.style.cursor=\"move\";
Drag.tdiv.style.border=\"1pxsolid#000000\";
Drag.tdiv.style.width=Drag.ao.offsetWidth;
Drag.tdiv.style.height=Drag.ao.offsetHeight;
Drag.tdiv.style.top=Drag.getInfo(Drag.ao).top;
Drag.tdiv.style.left=Drag.getInfo(Drag.ao).left;
document.body.appendChild(Drag.tdiv);
Drag.lastX=event.clientX;
Drag.lastY=event.clientY;
Drag.lastLeft=Drag.tdiv.style.left;
Drag.lastTop=Drag.tdiv.style.top;
},

draging:function(){//重要:判断MOUSE的位置
if(!Drag.dragged||Drag.ao==null)return;
vartX=event.clientX;
vartY=event.clientY;
Drag.tdiv.style.left=parseInt(Drag.lastLeft)+tX-Drag.lastX;
Drag.tdiv.style.top=parseInt(Drag.lastTop)+tY-Drag.lastY;
for(vari=0;i<parentTable.cells.length;i++){
varparentCell=Drag.getInfo(parentTable.cells[i]);
if(tX>=parentCell.left&&tX<=parentCell.right&&tY>=parentCell.top&&tY<=parentCell.bottom){
varsubTables=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(Drag.ao);
}
break;
}
for(varj=0;j<subTables.length;j++){
varsubTable=Drag.getInfo(subTables[j]);
if(tX>=subTable.left&&tX<=subTable.right&&tY>=subTable.top&&tY<=subTable.bottom){ [Page]
parentTable.cells[i].insertBefore(Drag.ao,subTables[j]);
break;
}else{
parentTable.cells[i].appendChild(Drag.ao);
}
}
}
}
}
,
dragEnd:function(){
if(!Drag.dragged)return;
Drag.dragged=false;
Drag.mm=Drag.repos(150,15);
Drag.ao.style.borderWidth=\"0px\";
Drag.ao.style.borderTop=\"1pxsolid#3366cc\";
Drag.tdiv.style.borderWidth=\"0px\";
Drag.ao.style.zIndex=1;
},
getInfo:function(o){//取得坐标
varto=newObject();
to.left=to.right=to.top=to.bottom=0;
vartwidth=o.offsetWidth;
vartheight=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;
returnto;
},
repos:function(aa,ab){
varf=Drag.tdiv.filters.alpha.opacity;
vartl=parseInt(Drag.getInfo(Drag.tdiv).left);
vartt=parseInt(Drag.getInfo(Drag.tdiv).top);
varkl=(tl-Drag.getInfo(Drag.ao).left)/ab;
varkt=(tt-Drag.getInfo(Drag.ao).top)/ab;
varkf=f/ab;
returnsetInterval(function(){if(ab<1){
clearInterval(Drag.mm);
Drag.tdiv.removeNode(true);
Drag.ao=null;
return;
}
ab--;
tl-=kl;
tt-=kt;
f-=kf;
Drag.tdiv.style.left=parseInt(tl)+\"px\";
Drag.tdiv.style.top=parseInt(tt)+\"px\";
Drag.tdiv.filters.alpha.opacity=f;
}
,aa/ab)
},
inint:function(){//初始化
for(vari=0;i<parentTable.cells.length;i++){