JS操作表格

js 对表格进行各种操作，javascript中对表格的操作方法大致有:insertRow(),insertCell(),deleteRow(i);表格的属性有rows(得到表格的行数); cells 

要找单元格中的控件，则用firstChild，一个对HTML表格进行动态增删改的例子.

<TABLE width="500" border="1" id="t" onKeyUp="sum(this)" onClick="setPos(this)">
<TR>
<TD><div contentEditable>项目部门</div></TD>
<TD><div contentEditable>部门1</div></TD>
<TD><div contentEditable>部门2</div></TD>
<TD><div contentEditable>部门3</div></TD>
<TD><div contentEditable>统计</div></TD>
</TR>
<TR>
<TD><div contentEditable>货物1</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div>0</div></TD>
</TR>
<TR>
<TD><div contentEditable>货物2</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div>0</div></TD>
</TR>
<TR>
<TD><div contentEditable>货物3</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div>0</div></TD>
</TR>
<TR>
<TD><div contentEditable>货物4</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div>0</div></TD>
</TR>
<TR>
<TD><div contentEditable>货物5</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div contentEditable>0</div></TD>
<TD><div>0</div></TD>
</TR>
<TR>
<TD><div contentEditable>总计</div></TD>
<TD><div>0</div></TD>
<TD><div>0</div></TD>
<TD><div>0</div></TD>
<TD><div>0</div></TD>
</TR>
</TABLE>
<input type="button" value="加一行" onClick="insertRow(document.all.t)">
<input type="button" value="加一列" onClick="insertCell(document.all.t)">
<input type="button" value="删除行" onClick="deleteRow(document.all.t)">
<input type="button" value="删除列" onClick="deleteCell(document.all.t)">
<input type="button" value="正序排列" onClick="ascRow(document.all.t)">
<input type="button" value="反序排列" onClick="descRow(document.all.t)">
<br>
<input type="button" value="横向正序排列" onClick="ascCell(document.all.t)">
<input type="button" value="横向反序排列" onClick="descCell(document.all.t)">
<input type="button" value="全部数据统计" onClick="getSum(document.all.t,'total')">
<input type="text" value="0" name="total" style="width:50">
<SCRIPT LANGUAGE="JavaScript">
<!--
var currRow="0";
var currCell="0";
function getSum(obj,objName){
var sum=0;
    for(var i=1;i<obj.rows.length-1;i++){
        for(var j=1;j<obj.rows[i].cells.length;j++){
           sum+=parseInt(obj.rows[i].cells[j].innerText);
  }
}
document.getElementsByName(objName)[0].value=sum;
}

//正序排列
function ascCell(obj){
if(currCell>=1&&currRow>=1){
  var len=obj.rows[0].cells.length;
  for(var j=0;j<len;j++){
   var order=0;
            for(var i=1;i<len-2;i++){
                 if(parseInt(obj.rows[currRow].cells[i].innerText)>parseInt(obj.rows[currRow].cells[i+1].innerText)){
                      for(var k=0;k<obj.rows.length;k++){
                           var tmp=obj.rows[k].cells[i].innerHTML;
         obj.rows[k].cells[i].innerHTML=obj.rows[k].cells[i+1].innerHTML;
                           obj.rows[k].cells[i+1].innerHTML=tmp;
       }
          order++;
        }
         }
   len--;
   if(order==0){
               break;
   }
  }
}
clear();
}

//反序排列
function descCell(obj){
if(currCell>=1&&currRow>=1){
  var len=obj.rows[0].cells.length;
  for(var j=0;j<len;j++){
   var order=0;
            for(var i=1;i<len-2;i++){
                 if(parseInt(obj.rows[currRow].cells[i].innerText)<parseInt(obj.rows[currRow].cells[i+1].innerText)){
                      for(var k=0;k<obj.rows.length;k++){
                           var tmp=obj.rows[k].cells[i].innerHTML;
         obj.rows[k].cells[i].innerHTML=obj.rows[k].cells[i+1].innerHTML;
                           obj.rows[k].cells[i+1].innerHTML=tmp;
       }
          order++;
        }
         }
   len--;
   if(order==0){
               break;
   }
  }
}
clear();
}

//正序排行
function ascRow(obj){
if(currCell>=1){
  var rows=obj.rows;
  var len=rows.length-2;
  for(var j=0;j<=rows.length-2;j++){
   var order=0;
            for(var i=1;i<len;i++){
                 if(parseInt(rows[i].cells[currCell].innerText)>parseInt(rows[i+1].cells[currCell].innerText)){
                      obj.moveRow(i,i+1);
          order++;
        }
         }
   len--;
   if(order==0){
               break;
   }
  }
}
clear();
}

//反序排行
function descRow(obj){
if(currCell>=1){
  var rows=obj.rows;
  var len=rows.length-2;
  for(var j=0;j<rows.length-2;j++){
   var order=0;
            for(var i=1;i<len;i++){
                 if(parseInt(rows[i].cells[currCell].innerText)<parseInt(rows[i+1].cells[currCell].innerText)){
                      obj.moveRow(i,i+1);
          order++;
        }
         }
   len--;
   if(order==0){
               break;
   }
  }
}
clear();
}

//删除行
function deleteRow(obj){
var rows=obj.rows.length;
if(currRow>=1&&currRow<rows-1){
        obj.deleteRow(currRow);
}
clear();
averCol(obj);
}

//删除列
function deleteCell(obj){
   if(currCell>=1&&currCell<obj.rows[0].cells.length-1){
       for(var i=0;i<obj.rows.length;i++){
           obj.rows[i].deleteCell(currCell);
    }
   }
   clear();
   averCol(obj);
}

function averCol(obj){
   var wh=obj.width;
   var cells=obj.rows[0].cells;
   for(var i=0;i<cells.length;i++){
        cells[i].width=Math.ceil(wh/cells.length);
   }
}
function insertRow(obj){
  if(currRow>=0&&currRow<obj.rows.length-1){
          var maxCell=obj.rows[0].cells.length;
          obj.insertRow(currRow+1);
          for(var i=0;i<maxCell;i++){
               obj.rows[currRow+1].insertCell(i);
            obj.rows[currRow+1].cells[i].innerHTML="<div contentEditable>0</div>";
          }
    clear();
    averCol(obj);
    chnBgcolor(obj,currRow,"ffffff");
  }
}
function insertCell(obj){
   if(currCell&&currCell!=obj.rows[0].cells.length-1){
        for(var i=0;i<obj.rows.length;i++){
            obj.rows[i].insertCell(currCell+1);
            obj.rows[i].cells[currCell+1].innerHTML="<div contentEditable>0</div>";
       }
       clear();
       averCol(obj);
    chnBgcolor(obj,currRow,"ffffff");
   }
}
function check(obj){
    var k=parseInt(obj.innerText);
if(isNaN(k)){
    obj.childNodes[0].innerText=0;
    return 0;
}
else{
    obj.childNodes[0].innerText=k;
       return k;
}
}
function sum(obj){
    var o=event.srcElement;
var total=0;
var tindex=obj.rows.length-1;
if(o.parentElement.tagName=="TD"&&o.parentElement.cellIndex>=1&&o.parentElement.parentElement.rowIndex>=1){
     var index=o.parentElement.cellIndex;
  var pindex=o.parentElement.parentElement.rowIndex;
        for(var i=1;i<tindex;i++){
             var num=check(obj.rows[i].cells[index]);
    total=parseInt(total)+num;
  }
  var total1=0;
  for(i=1;i<obj.rows[pindex].cells.length-1;i++){
              total1+=check(obj.rows[pindex].cells[i]);
  }
  obj.rows[pindex].cells(obj.rows[pindex].cells.length-1).innerText=total1;
  obj.rows[tindex].cells[index].innerText=total;
  obj.rows[tindex].cells(obj.rows[0].cells.length-1).innerText=addAll(obj);
  }
  setPos(obj);
}
function chnBgcolor(obj,index,color){
    for(var i=0;i<obj.rows.length;i++){
         if(i==index){
             obj.rows[i].bgColor=color;
   }
   else{
             obj.rows[i].bgColor="ffffff";
   }
}
}
function setPos(obj){
   var o=event.srcElement;
   if(o.tagName=="DIV"){
       currRow=o.parentElement.parentElement.rowIndex;
       currCell=o.parentElement.cellIndex;
    chnBgcolor(obj,currRow,"dedede");
   }
   else if(o.tagName=="TD"){
       currRow=o.parentElement.rowIndex;
       currCell=o.cellIndex;
   }
   else{
       currRow=obj.rows.length-1;
    currCeil=obj.rows[0].cells.length-1;
   }
}
function clear(){
   currRow=0;
   currCell=0;
}
function addAll(obj){
   var total=0;
   for(var i=1;i<obj.rows[0].cells.length-1;i++){
         total+=parseInt(obj.rows[obj.rows.length-1].cells[i].innerText);
   }
   return total;
}
//-->
</SCRIPT>