怎么获取table中动态添加行的控件和它的值

如何获取table中动态添加行的控件和它的值
我的代码如下:

客户端代码:
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
  <title>无标题文档</title>

  <script language="javascript">
// Example: obj = findObj("image1");
function findObj(theObj, theDoc)
{
  var p, i, foundObj;
  
  if(!theDoc) theDoc = document;
  if( (p = theObj.indexOf("?")) > 0 && parent.frames.length)
  {
  theDoc = parent.frames[theObj.substring(p+1)].document;
  theObj = theObj.substring(0,p);
  }
  if(!(foundObj = theDoc[theObj]) && theDoc.all) foundObj = theDoc.all[theObj];
  for (i=0; !foundObj && i < theDoc.forms.length; i++) 
  foundObj = theDoc.forms[i][theObj];
  for(i=0; !foundObj && theDoc.layers && i < theDoc.layers.length; i++) 
  foundObj = findObj(theObj,theDoc.layers[i].document);
  if(!foundObj && document.getElementById) foundObj = document.getElementById(theObj);
  
  return foundObj;
}

//添加一个参与人填写行
function AddSignRow(){
 //读取最后一行的行号,存放在txtTRLastIndex文本框中 
 var txtTRLastIndex = findObj("txtTRLastIndex",document);
 var rowID = parseInt(txtTRLastIndex.value);
 //alert(txtTRLastIndex.value);
 var tbNew = findObj("tbNew",document);
 if(parseInt(tbNew.rows.length) < 6)
 {
 //添加行
 var newTR = tbNew.insertRow(tbNew.rows.length);
 newTR.id = "SignItem" + rowID;
 
 //添加列:序号
 var newNameTD=newTR.insertCell(0);
 newNameTD.width ="30";
 newNameTD.style.bgcolor ="White";
 //添加列内容
 newNameTD.innerHTML = newTR.rowIndex.toString();
 
 //添加列:设备类别
 var newConfigurationType=newTR.insertCell(1);
 newConfigurationType.width ="60";
 //添加列内容
 newConfigurationType.innerHTML = "<input name='txtConfigurationType" + rowID + "' id='txtConfigurationType" + rowID + "' type='text' size='6' />";
 
 //添加列:设备型号
 var newConfigurationScale=newTR.insertCell(2);
 newConfigurationScale.width ="60";
 //添加列内容
 newConfigurationScale.innerHTML = "<input name='txtConfigurationScale" + rowID + "' id='txtConfigurationScale" + rowID + "' type='text' size='6' />";
 
 //添加列:申请数量
 var newCountTD=newTR.insertCell(3);
 newCountTD.width ="60";
 //添加列内容
 newCountTD.innerHTML = "<input name='txtCount" + rowID + "' id='txtCount" + rowID + "' type='text' size='6' />";
 
 //添加列:使用人
 var newConfigurationUserTD=newTR.insertCell(4);
 newConfigurationUserTD.width ="60";
 //添加列内容
 newConfigurationUserTD.innerHTML = "<input name='txtConfigurationUser" + rowID + "' id='txtConfigurationUser" + rowID + "' type='text' size='6' />";
 
 //添加列:申请原因
 var newAppReasonsTD=newTR.insertCell(5);
 newAppReasonsTD.width ="60";
 //添加列内容
 newAppReasonsTD.innerHTML = "<input name='txtAppReasons" + rowID + "' id='txtAppReasons" + rowID + "' type='text' size='6' />";
 
 //添加列:申请类别
 var newAppTypeTD=newTR.insertCell(6);
 newAppTypeTD.width ="60";
 //添加列内容
 newAppTypeTD.innerHTML = "<input name='txtAppType" + rowID + "' id='txtAppType" + rowID + "' type='text' size='6' />";