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(){ //讀取最后一行的行號，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,從最后一行往前刪除 for(i=rowscount - 1;i > 0; i--){ signFrame.deleteRow(i); } //重置最后行號為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。
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