JavaScript实现动态添加，删除行的方法实例详解

本文实例讲述了JavaScript实现动态添加，删除行的方法。分享给大家供大家参考。具体如下：

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<title>增加Table行</title>

</head>

<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);

//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>

<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>

JavaScript实现动态的增加或删除table的行

<SCRIPT LANGUAGE="JScript">

function numberCells()

{

var count=0;

for (i=0; i < document.all.mytable.rows.length; i++)

{

for (j=0; j < document.all.mytable.rows(i).cells.length; j++)

{

document.all.mytable.rows(i).cells(j).innerText = count;

count++;

}

}

}

function tb_addnew()

{

var ls_t=document.all("mytable")

maxcell=ls_t.rows(0).cells.length;

mynewrow = ls_t.insertRow();

for(i=0;i<maxcell;i++)

{

mynewcell=mynewrow.insertCell();

mynewcell.innerText="a"+i;

}

}

function tb_delete()

{

var ls_t=document.all("mytable");

maxcell=ls_t.rows.length;

if(maxcell > 1)

{

ls_t.deleteRow() ;

}

}

</SCRIPT>

<BODY onload="numberCells()">

<TABLE id=mytable border=1>

<TR><TH> </TH><TH> </TH><TH> </TH><TH> </TH></TR>

<TR><TD> </TD><TD> </TD><TD> </TD><TD> </TD></TR>

<TR><TD> </TD><TD> </TD><TD> </TD><TD> </TD></TR>

</TABLE>

<input type=button value="Ins Row" onclick="tb_addnew()">

<input type=button value="Del Row" onclick="tb_delete()" >

希望本文所述对大家的javascript程序设计有所帮助。