JavaScript实现动态添加，删除行

来源：互联网发布：java中的init方法编辑：程序博客网时间：2024/05/17 07:41

<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>

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()" >