<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="jquery.min.js"></script>
<title></title>
<script>
$(document).ready(function(){
//<tr/>居中
$("#tab tr").attr("align","center");
//增加<tr/>
$("#but").click(function(){
var _len = $("#tab tr").length;
$("#tab").append("<tr id="+_len+" align='center'>"
+"<td>"+_len+"</td>"
+"<td>Dynamic TR"+_len+"</td>"
+"<td><input type='text' name='desc"+_len+"' id='desc"+_len+"' /></td>"
+"<td><a href=\'#\' onclick=\'deltr("+_len+")\'>删除</a></td>"
+"</tr>");
})
})
//删除<tr/>
var deltr =function(index)
{
var _len = $("#tab tr").length;
$("tr[id='"+index+"']").remove();//删除当前行
for(var i=index+1,j=_len;i<j;i++)
{
var nextTxtVal = $("#desc"+i).val();
$("tr[id=\'"+i+"\']")
.replaceWith("<tr id="+(i-1)+" align='center'>"
+"<td>"+(i-1)+"</td>"
+"<td>Dynamic TR"+(i-1)+"</td>"
+"<td><input type='text' name='desc"+(i-1)+"' value='"+nextTxtVal+"' id='desc"+(i-1)+"'/></td>"
+"<td><a href=\'#\' onclick=\'deltr("+(i-1)+")\'>删除</a></td>"
+"</tr>");
}
}
</script>
</head>
<body>
<table id="tab" border="1" width="60%" align="center" style="margin-top:20px">
<tr>
<td width="20%">序号</td>
<td>标题</td>
<td>描述</td>
<td>操作</td>
</tr>
</table>
<div style="border:2px;
border-color:#00CC00;
margin-left:20%;
margin-top:20px">
<input type="button" id="but" value="增加"/>
</div>
</body>
</html>