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js实现table添加行tr、删除行tr、清空行tr的简单实例

时间：2021-07-01 10:21:17 帮助过：4人阅读

如下所示：

<!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='javascript:;' onclick=\"DeleteSignRow('SignItem" + 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); 
alert(rowid); 
//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" onclick="AddSignRow()" />  
   <input type="button" name="Submit2" value="清空" onclick="ClearAllSign()" /> 
   <input name='txtTRLastIndex' type='hidden' id='txtTRLastIndex' value="1" /> 
  </div> 
  
</BODY> 
</HTML>

删除行用下面的方法比较好……

<html> 
<head> 
<title>1</title> 
<script> 
//得到行对象 
function getRowObj(obj) 
{ 
var i = 0; 
while(obj.tagName.toLowerCase() != "tr"){ 
obj = obj.parentNode; 
if(obj.tagName.toLowerCase() == "table")return null; 
} 
return obj; 
} 
  
//根据得到的行对象得到所在的行数 
function getRowNo(obj){ 
var trObj = getRowObj(obj); 
var trArr = trObj.parentNode.children; 
for(var trNo= 0; trNo < trArr.length; trNo++){ 
if(trObj == trObj.parentNode.children[trNo]){ 
alert(trNo+1); 
} 
} 
} 
  
//删除行 
function delRow(obj){ 
var tr = this.getRowObj(obj); 
if(tr != null){ 
tr.parentNode.removeChild(tr); 
}else{ 
throw new Error("the given object is not contained by the table"); 
} 
} 
</script> 
</head> 
  
<body> 
<table border = "1"> 
<tr> 
<td>A<input type="button" value="A" onclick="getRowNo(this)">getRowNo<td> 
</tr> 
<tr> 
<td>B<input type="button" value="B" onclick="delRow(this)">delRow<td> 
</tr> 
<tr> 
<td>C<input type="button" value="C" onclick="getRowNo(this)">getRowNo</td> 
</tr> 
<tr> 
<td>D<input type="button" value="D" onclick="getRowNo(this)">getRowNo</td> 
</tr> 
</table> 
</body> 
<html>

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