//得到当前列的列号
function getCurrentColNo(tdObject)
{
 var tableObject = getTableRootByTd(tdObject);
 var current_row_no = getCurrentRowNo(tdObject);
 var current_row_td_num = tableObject.rows[current_row_no].cells.length;
 for(var i=0;i<current_row_td_num;i++)
 {
  if(tableObject.rows[current_row_no].cells[i] == tdObject)
  {
   return i;
  }
 }
}

//得到当前行的行号
function getCurrentRowNo(tdObject)
{
 var tableObject = getTableRootByTd(tdObject);
 for(var i=0;i<tableObject.rows.length;i++){
  if(tdObject.parentNode == tableObject.rows[i]){
   return i;
  }
 }
}