本文實例講述了JavaScript實現動態添加，刪除行的方法。分享給大家供大家參考。具體如下：
<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;}
//添加一個參與人填寫行
function AddSignRow(){ //讀取最後一行的行號，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:序號
var newNameTD=newTR.insertCell(0);
//添加列內容
newNameTD.innerHTML = newTR.rowIndex.toString();
//添加列:姓名
var newNameTD=newTR.insertCell(1);
//添加列內容
newNameTD.innerHTML = "<input name='txtName" + rowID + "' id='txtName" + rowID + "' type='text' size='12' />";
//添加列:電子郵箱
var newEmailTD=newTR.insertCell(2);
//添加列內容
newEmailTD.innerHTML = "<input name='txtEMail" + rowID + "' id='txtEmail" + rowID + "' type='text' size='20' />";
//添加列:電話
var newTelTD=newTR.insertCell(3);
//添加列內容
newTelTD.innerHTML = "<input name='txtTel" + rowID + "' id='txtTel" + rowID + "' type='text' size='10' />";
//添加列:手機
var newMobileTD=newTR.insertCell(4);
//添加列內容
newMobileTD.innerHTML = "<input name='txtMobile" + rowID + "' id='txtMobile" + rowID + "' type='text' size='12' />";
//添加列:公司名
var newCompanyTD=newTR.insertCell(5);
//添加列內容
newCompanyTD.innerHTML = "<input name='txtCompany" + rowID + "' id='txtCompany" + rowID + "' type='text' size='20' />";
//添加列:刪除按鈕
var newDeleteTD=newTR.insertCell(6);
//添加列內容
newDeleteTD.innerHTML = "<div align='center' style='width:40px'><a href='javascript:;' onclick=\"DeleteSignRow('SignItem" + rowID + "')\">刪除</a></div>";
//將行號推進下一行
txtTRLastIndex.value = (rowID + 1).toString() ;
}
//刪除指定行
function DeleteSignRow(rowid){
var signFrame = findObj("SignFrame",document);
var signItem = findObj(rowid,document);
//獲取將要刪除的行的Index
var rowIndex = signItem.rowIndex;
//刪除指定Index的行
signFrame.deleteRow(rowIndex);
//重新排列序號，如果沒有序號，這一步省略
for(i=rowIndex;i<signFrame.rows.length;i++){
signFrame.rows[i].cells[0].innerHTML = i.toString();
}
}//清空列表
function ClearAllSign(){
if(confirm('確定要清空所有參與人嗎？')){
var signFrame = findObj("SignFrame",document);
var rowscount = signFrame.rows.length;
//循環刪除行,從最後一行往前刪除
for(i=rowscount - 1;i > 0; i--){
signFrame.deleteRow(i);
}
//重置最後行號為1
var txtTRLastIndex = findObj("txtTRLastIndex",document);
txtTRLastIndex.value = "1";
//預添加一行
AddSignRow();
}
}
</script>
<body>
<div>
<table width="613" border="0" cellpadding="2" cellspacing="1" id="SignFrame">
<tr id="trHeader">
<td width="27" bgcolor="#96E0E2">序號</td>
<td width="64" bgcolor="#96E0E2">用戶姓名</td>
<td width="98" bgcolor="#96E0E2">電子郵箱</td>
<td width="92" bgcolor="#96E0E2">固定電話</td>
<td width="86" bgcolor="#96E0E2">移動手機</td>
<td width="153" bgcolor="#96E0E2">公司名稱</td>
<td width="57" align="center" bgcolor="#96E0E2"> </td>
</tr>
</table>
</div>
<div>
<input type="button" name="Submit" value="添加參與人" 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實現動態的增加或刪除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()" >
希望本文所述對大家的javascript程序設計有所幫助。