很简单的问题，这代码为什么遍历不了Table??

Question

function ChangeInput()
{
   var radioButton = document.getElementById("RadioButtonList1_0");
   var Addrows = document.getElementById("filearea").rows;   //表格名filearea
   if(radioButton.checked)
   {   
      for(var i=0;i<Addrows.length;i++)
      {       
         
         //这里alert(Addrows.length)也能得到值
         //但下面这步始终提示执行不了
        Addrows(i).Cells(1).style.display="none";          
      }
   }
}  

Answer 1

Addrows[i].Cells[1].style.display = "none";

Answer 2

   var tb = document.getElementById('filearea');
   if(radioButton.checked)
   {   
      for(var i=0;i<tb.rows.length;i++)
      {      
           for(var j=0;j<tb.rows[i].cells.length;j++)
           {
              tb.rows[i].cells[2].style.display="none"；
           }                                           
      }
   }这个没问题
   var tb = document.getElementById('filearea');
   if(radioButton.checked)
   {   
      for(var i=0;i<tb.rows.length;i++)
      {      
           tb.rows[i].cells[2].style.display="none"；
                                                     
      }
   }这个就有问题了，我倒~~~~~~~