js动态给table添加/删除tr的方法

  

复制代码 代码如下:

  <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

  <HTML>

  <HEAD>

  <TITLE> New Document </TITLE>

  <META NAME="Generator" CONTENT="EditPlus">

  <META NAME="Author" CONTENT="">

  <META NAME="Keywords" CONTENT="">

  <META NAME="Description" CONTENT="">

  <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);

  var signFrame = findObj("SignFrame",document);

  //添加行

  var newTR = signFrame.insertRow(signFrame.rows.length);

  newTR.id = "SignItem" + rowID;

  //添加列:序号

  var newNameTD=newTR.insertCell(0);

  //添加列内容

  newNameTD.innerHTML = newTR.rowIndex.toString();

  //添加列:姓名

  var newNameTD=newTR.insertCell(1);

  //添加列内容

  newNameTD.innerHTML = "<input name='txtName" + rowID + "' id='txtName" + rowID + "' type='text' size='12' />";

  //添加列:电子邮箱

  var newEmailTD=newTR.insertCell(2);

  //添加列内容

  newEmailTD.innerHTML = "<input name='txtEMail" + rowID + "' id='txtEmail" + rowID + "' type='text' size='20' />";

  //添加列:电话

  var newTelTD=newTR.insertCell(3);

  //添加列内容

  newTelTD.innerHTML = "<input name='txtTel" + rowID + "' id='txtTel" + rowID + "' type='text' size='10' />";

  //添加列:手机

  var newMobileTD=newTR.insertCell(4);

  //添加列内容

  newMobileTD.innerHTML = "<input name='txtMobile" + rowID + "' id='txtMobile" + rowID + "' type='text' size='12' />";

  //添加列:公司名

  var newCompanyTD=newTR.insertCell(5);

  //添加列内容

  newCompanyTD.innerHTML = "<input name='txtCompany" + rowID + "' id='txtCompany" + rowID + "' type='text' size='20' />";

  //添加列:删除按钮

  var newDeleteTD=newTR.insertCell(6);

  //添加列内容

  newDeleteTD.innerHTML = "<div align='center' style='width:40px'><a href='#'" + rowID + "')">删除</a></div>";

  //将行号推进下一行

  txtTRLastIndex.value = (rowID + 1).toString() ;

  }

  //删除指定行

  function DeleteSignRow(rowid){

  var signFrame = findObj("SignFrame",document);

  var signItem = findObj(rowid,document);

  //获取将要删除的行的Index

  var rowIndex = signItem.rowIndex;

  //删除指定Index的行

  signFrame.deleteRow(rowIndex);

  //重新排列序号,如果没有序号,这一步省略

  for(i=rowIndex;i<signFrame.rows.length;i++){

  signFrame.rows[i].cells[0].innerHTML = i.toString();

  }

  }//清空列表

  function ClearAllSign(){

  if(confirm('确定要清空所有参与人吗?')){

  var signFrame = findObj("SignFrame",document);

  var rowscount = signFrame.rows.length;

  //循环删除行,从最后一行往前删除

  for(i=rowscount - 1;i > 0; i--){

  signFrame.deleteRow(i);

  }

  //重置最后行号为1

  var txtTRLastIndex = findObj("txtTRLastIndex",document);

  txtTRLastIndex.value = "1";

  //预添加一行

  AddSignRow();

  }

  }

  </script>

  </HEAD>

  <BODY>

  <div>

  <table width="613" border="0" cellpadding="2" cellspacing="1" id="SignFrame">

  <tr id="trHeader">

  <td width="27" bgcolor="#96E0E2">序号</td>

  <td width="64" bgcolor="#96E0E2">用户姓名</td>

  <td width="98" bgcolor="#96E0E2">电子邮箱</td>

  <td width="92" bgcolor="#96E0E2">固定电话</td>

  <td width="86" bgcolor="#96E0E2">移动手机</td>

  <td width="153" bgcolor="#96E0E2">公司名称</td>

  <td width="57" align="center" bgcolor="#96E0E2"> </td>

  </tr>

  </table>

  </div>

  <div>

  <input type="button" name="Submit" value="添加参与人" />

  <input type="button" name="Submit2" value="清空" />

  <input name='txtTRLastIndex' type='hidden' id='txtTRLastIndex' value="1" />

  </div>

  </BODY>

  </HTML>