javascript 一个很急的问题，各位大侠帮帮我啊！！！！

小弟是要完成一个网页拖拽功能，动态添加一个"table"但是要把该"table"的class属性设置成"dragTable",但是设置完之后不能拖拽啊！难道是mytable.setAttribute("class","dragTable");方法是错误的，还是class属性是只读的啊！动态添加table的代码如下：
     mytable = document.createElement("TABLE");
      mytablebody = document.createElement("TBODY");

mycurrent_row0=document.createElement("TR");
mycurrent_row1=document.createElement("TR");

mycurrent_cell0=document.createElement("TD");
         mycurrent_cell1=document.createElement("TD");
currenttext0=document.createTextNode(title);

mycurrent_cell0.setAttribute('bgcorlor','#ffffff');
alert(mycurrent_row0.getAttribute('bgColor'));
mycurrent_cell0.style.backgroundColor='#ffffff';
currenttext1=document.createTextNode(content);

mycurrent_cell0.appendChild(currenttext0);
mycurrent_cell1.appendChild(currenttext1);
                      mycurrent_row0.appendChild(mycurrent_cell0);
                      mycurrent_row1.appendChild(mycurrent_cell1);
                      mytablebody.appendChild(mycurrent_row0);
                      mytablebody.appendChild(mycurrent_row1);
                      mytable.appendChild(mytablebody);
                      mytable.setAttribute("border","1");
                      mytable.setAttribute("class","dragTable");
                      mytable.className="dragTable";
                     alert(mytable.getAttribute("class"));
                     mytable.setAttibute("cellspacing","0");
                     mytable.setAttribute("width","100%");
                     alert(mytable.getAttribute("width"));
                     mytable.setAttribute("height","50");
                     parentTable.cells[column].appendChild(mytable);

8 个解决方案

#1

其他整个代码如下：
<html>
<head>
<title>DRAG the DIV</title>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<style>
*{font-size:12px}
.dragTable{
font-size:12px;
border-top:1px solid #3366cc;
margin-bottom: 10px;
width:100%;
background-color:#FFFFFF;
}

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>

<script defer>

/****JoeLee************E-MAIL:hktx@163.com****<a class='Channel_KeyLink' href='http://www.51it.org/school/tools/tongxun/qq/index.html'>QQ</a>:48293707*****11:09 2006-2-9******/

var Drag={
  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="1px dashed red";
  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="1px solid #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(){//ﾖﾘﾒｪ:ﾅﾐｶﾏMOUSEｵﾄﾎｻﾖﾃ

if(!Drag.dragged||Drag.ao==null)return;

var tX=event.clientX;

var tY=event.clientY;

Drag.tdiv.style.left=parseInt(Drag.lastLeft)+tX-Drag.lastX;

Drag.tdiv.style.top=parseInt(Drag.lastTop)+tY-Drag.lastY;

for(var i=0;i<parentTable.cells.length;i++){

  var parentCell=Drag.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(Drag.ao);

    }

    break;

   }

   for(var j=0;j<subTables.length;j++){

    var subTable=Drag.getInfo(subTables[j]);

    if(tX>=subTable.left&&tX<=subTable.right&&tY>=subTable.top&&tY<=subTable.bottom){

     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="1px solid #3366cc";

Drag.tdiv.style.borderWidth="0px";

Drag.ao.style.zIndex=1;

},

getInfo:function(o){//ﾈ｡ｵﾃﾗ・

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;

},

repos:function(aa,ab){

var f=Drag.tdiv.filters.alpha.opacity;

var tl=parseInt(Drag.getInfo(Drag.tdiv).left);

var tt=parseInt(Drag.getInfo(Drag.tdiv).top);

var kl=(tl-Drag.getInfo(Drag.ao).left)/ab;

var kt=(tt-Drag.getInfo(Drag.ao).top)/ab;

var kf=f/ab;

return setInterval(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(){//ｳｼｻｯ

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",Drag.dragStart);
  }
}

document.onmousemove=Drag.draging;
document.onmouseup=Drag.dragEnd;
}

//end of Object Drag

}

Drag.inint();
function _show(str){
var w=window.open('','');
var d=w.document;
d.open();
str=str.replace(/=(?!")(.*?)(?!")( |>)/g,"=\"$1\"$2");
str=str.replace(/(<)(.*?)(>)/g,"<span style='color:red;'><$2></span><br />");
str=str.replace(/\r/g,"<br />\n");
d.write(str);
}
function insertTable(parentTable,column,title,content){
         //  var divDiv = document.createElement("div");
//divDiv.innerHTML = '<table cellpadding="0" cellspacing="0" width="100%" class="dragTable"><tr><td></td></tr></table>';
// parentTable.innerHTML='<table cellpadding="0" cellspacing="0" width="100 class="dragTable"><tr><td></td></tr></table>';
var nTable=document.createElement("table");
      // parentTableTR=document.createElement("TR");
      // parentTableTD=document.createElement("TD");

        mytable = document.createElement("TABLE");
        mytablebody = document.createElement("TBODY");

mycurrent_row0=document.createElement("TR");
mycurrent_row1=document.createElement("TR");

mycurrent_cell0=document.createElement("TD");
    mycurrent_cell1=document.createElement("TD");
currenttext0=document.createTextNode(title);

mycurrent_cell0.setAttribute('bgcorlor','#ffffff');
alert(mycurrent_row0.getAttribute('bgColor'));
mycurrent_cell0.style.backgroundColor='#ffffff';
currenttext1=document.createTextNode(content);

mycurrent_cell0.appendChild(currenttext0);
mycurrent_cell1.appendChild(currenttext1);
        mycurrent_row0.appendChild(mycurrent_cell0);
        mycurrent_row1.appendChild(mycurrent_cell1);

mytablebody.appendChild(mycurrent_row0);
mytablebody.appendChild(mycurrent_row1);
        // appends TBODY into TABLE
        mytable.appendChild(mytablebody);
        // sets the border attribute of mytable to 2;
        mytable.setAttribute("border","1");
        mytable.setAttribute("class","dragTable");
mytable.className="dragTable";

        alert(mytable.getAttribute("class"));
    //   mytable.setAttibute("cellspacing","0");
        mytable.setAttribute("width","100%");
       alert(mytable.getAttribute("width"));
mytable.setAttribute("height","50");

//parentTable.appendChild(parentTableTR);
//parentTable.appendChild(parentTableTD);
parentTable.cells[column].appendChild(mytable);
//window.location.reload();

}
function test1(){
str1+="parentTable.cells.length=";
str1+=document.all.parentTable.cells.length;
str1+="\n";

var subTables=parentTable.cells[0].getElementsByTagName("table");
str1+="第一个子表中的table数：";
str1+=subTables.length;
str1+="\n";

disp1.value=str1
}

function test2(){
var thecolor=document.getElementsByTagName("table");
var element=thecolor[1].attributes["class"].value;

var col=document.all.column.value;
var t=document.all.title.value;
var c=document.all.content.value;
//  alert(thecolor);

insertTable(document.all.parentTable,col,t,c);

}

</script>

</head>

#2

<body>
column:<input name="column"><br>
title:<input name="title"><br>
content:<input name="content"><br>
<input type="button" value="增加一个table" onclick="return test2();"><br>
<input type="button" value="显示属性" onclick="return test1();" id=button2 name=button1><br>
<table border="1" width="100%" height=500 id="parentTable">

<tr>
<td>
<table border="1" width="100%" class="dragTable">
<tr>
<td bgcolor="green">gmail</td>
</tr>
<tr>
<td>login gmail</td>
</tr>
</table>

<table border="1" width="100%" class="dragTable">
<tr>
<td bgcolor="blue">天气情况</td>
</tr>
<tr>
<td>相当好</td>
</tr>
</table>

</td>
<td>
2
</td>
<td>
3
</td>
</tr>
</table>

</body>

</html>

#3

很急啊！
都弄了3天了！
在线等！！！

#4

来接分! 你用用document.getElementById("").style=""来看一下

#5

dinggushan
您说的是什么意思啊

#6

.dragTable{
font-size:12px;
border-top:1px solid #3366cc;
margin-bottom: 10px;
width:100%;
background-color:#FFFFFF;
position:absolute; /* add attribute */
z-index:9; /* add attribute */
}

#7

来支持兄弟下

#8

对象名.className=""

#1

#2

#3