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'><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" /> <input type="button" name="Submit2" value="清空" /> <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"> <input type=button value="Del Row" >
希望本文所述对大家的javascript程序设计有所帮助。