Js实现动态添加删除Table行示例

最近做项目遇到要动态添加、删除表格行的操作，实现如下

html代码

<table cellpadding="0" cellspacing="0" border="1" style="margin:auto; width:96%;" id="LearnInfoItem"> 
<tr > 
<td colspan="8" bgcolor="#96E0E2" style="height:30px;" ><h3 style="text-align:center; margin:0;">主要学习简历</h3></td> 
</tr> 
<tr id="tr1"> 
<td class="tdStyle2">起讫时间 </td> <td class="tdStyle2">毕业院校</td> 
<td class="tdStyle2">所学专业</td> 
<td class="tdStyle2">学制</td> 
<td class="tdStyle2">学位</td> 
<td class="tdStyle2">学习方式</td> 
<td class="tdStyle2">文化程度</td> 
<td class="tdStyle2"> 
<input type="button" name="LearnAdd" value="添加" onclick="LearnAddSignRow()" /> 
<input name='LearnTRLastIndex' type='hidden' id='LearnTRLastIndex' value="1" /> 
</td> 
</tr> 
</table>

javascript代码：

<script language="javascript" type="text/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; 
} 

//添加一行学习简历 
function LearnAddSignRow(){ //读取最后一行的行号，存放在LearnTRLastIndex文本框中 
var LearnTRLastIndex = findObj("LearnTRLastIndex",document); 
var rowID = parseInt(LearnTRLastIndex.value); 
var signFrame = findObj("LearnInfoItem",document); 
//添加行 
var newTR = signFrame.insertRow(signFrame.rows.length); 
newTR.id = "LearnItem" + rowID; 
//添加列:起讫时间 
var newNameTD=newTR.insertCell(0); 
//添加列内容 
newNameTD.innerHTML = "<input name='txtLearnStartDate" + rowID + "' id='txtLearnStartDate" + rowID + "' type='text' class='inputStyle' />"; 
//添加列:毕业院校 
var newNameTD=newTR.insertCell(1); 
//添加列内容 
newNameTD.innerHTML = "<input name='txtName" + rowID + "' id='txtName" + rowID + "' type='text' class='inputStyle' />"; 
//添加列:所学专业 
var newEmailTD=newTR.insertCell(2); 
//添加列内容 
newEmailTD.innerHTML = "<input name='txtEMail" + rowID + "' id='txtEmail" + rowID + "' type='text' class='inputStyle' />"; 
//添加列:学制 
var newTelTD=newTR.insertCell(3); 
//添加列内容 
newTelTD.innerHTML = "<input name='txtTel" + rowID + "' id='txtTel" + rowID + "' type='text' class='inputStyle' />"; 
//添加列:学位 
var newMobileTD=newTR.insertCell(4); 
//添加列内容 
newMobileTD.innerHTML = "<input name='txtMobile" + rowID + "' id='txtMobile" + rowID + "' type='text' class='inputStyle' />"; 
//添加列:学习方式 
var newMobileTD=newTR.insertCell(5); 
//添加列内容 
newMobileTD.innerHTML = "<input name='txtMobile" + rowID + "' id='txtMobile" + rowID + "' type='text' class='inputStyle' />"; 
//添加列:文化程度 
var newCompanyTD=newTR.insertCell(6); 
//添加列内容 
newCompanyTD.innerHTML = "<input name='txtCompany" + rowID + "' id='txtCompany" + rowID + "' type='text' class='inputStyle' />"; 

//添加列:删除按钮 
var newDeleteTD=newTR.insertCell(7); 
//添加列内容 
newDeleteTD.innerHTML = "<div align='center'><input id='txtDel" + rowID + "' type='button' value='删除' onclick=\"LearnDeleteRow('LearnItem" + rowID + "')\" class='inputStyle' /></div>"; 
//将行号推进下一行 
LearnTRLastIndex.value = (rowID + 1).toString() ; 
} 
//删除指定行 
function LearnDeleteRow(rowid){ 
var signFrame = findObj("LearnInfoItem",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); 
} 
} 
</script>

实现效果：