<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(huán)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">&nbsp;</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(tài)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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