js简单表格操作，对表格进行增删改，效果图：
全部代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<script type="text/javascript" src="js/jquery.2.1.4.min.js" ></script>
<title>简单表格操作</title>
<style type="text/css">
body {
line-height: 24px;
font: 14px Helvetica Neue, Helvetica, PingFang SC, 5FAE8F6F96C59ED1, Tahoma, Arial, sans-serif;
}
.layui-btn {
background: #1E9FFF;
display: inline-block;
height: 38px;
line-height: 38px;
padding: 0 18px;
background-color: #009688;
color: #fff;
white-space: nowrap;
text-align: center;
font-size: 14px;
border: none;
border-radius: 2px;
cursor: pointer;
}
.layui-btn:hover {
opacity: .8;
filter: alpha(opacity=80);
color: #fff;
}
table {
margin-top: 10px;
border-spacing: 0;
100%;
text-align: center;
border: 1px solid #E6E6E6;
}
table thead tr th {
background: #F2F2F2;
height: 28px;
line-height: 28px;
padding: 5px 15px;
border-bottom: 1px solid #E6E6E6;
border-right: 1px solid #E6E6E6;
}
table tbody tr td {
20%;
background: #FFFFFF;
height: 28px;
line-height: 28px;
padding: 5px 15px;
border-bottom: 1px solid #E6E6E6;
border-right: 1px solid #E6E6E6;
}
table tbody tr td input {
height: 22px;
border: 0px;
border-bottom: 1px solid #DEDEDE;
}
table tbody tr:hover td {
background: #F2F2F2;
}
a {
display: inline-block;
margin: 3px 5px;
color: #009688;
}
a:hover {
cursor: pointer;
color: #1E9FFF;
text-decoration: underline;
}
label {
cursor: pointer;
}
label input {
cursor: pointer;
position: relative;
top: 1px;
}
</style>
</head>
<body>
<div>
<button class="layui-btn" onclick="addRow()">新增行</button>
<label for="saverow"><input type="checkbox" id="saverow"/>新增前保存所有行</label>
</div>
<table id="test">
<thead>
<tr>
<th>序号</th>
<th>账号</th>
<th>姓名</th>
<th>密码</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>sa</td>
<td>管理员</td> <!-- <input type="text"> -->
<td>123</td>
<td><a>修改</a><a>删除</a></td>
</tr>
<tr>
<td>2</td>
<td>zhangsan</td>
<td>张三</td>
<td>123</td>
<td><a>修改</a><a>删除</a></td>
</tr>
<tr>
<td>3</td>
<td>lisi</td>
<td>李四</td>
<td>123</td>
<td><a>修改</a><a>删除</a></td>
</tr>
<tr>
<td>4</td>
<td>wangwu</td>
<td>王五</td>
<td>123</td>
<td><a>修改</a><a>删除</a></td>
</tr>
<tr>
<td>5</td>
<td>chengliu</td>
<td>陈六</td>
<td>123</td>
<td><a>修改</a><a>删除</a></td>
</tr>
</tbody>
</table>
<script type="text/javascript">
$(function(){
//load加载动态修改表格样式
if($("#test tbody tr").length > 0){
$("#test").css("border-bottom", "0px");
$("#test").css("border-right", "0px");
}
//注册表格操作点击事件
registerClick();
});
//注册表格操作点击事件
function registerClick(){
//防止重复注册事件：.off("click")
$("#test tbody tr td a").off("click").on("click", function(){
var text = $(this).text();
switch(text){
case "修改":
updateRow($(this));
break;
case "保存":
saveRow($(this));
break;
case "删除":
deleteRow($(this));
break;
}
});
}
//新增行
function addRow(){
if($("#saverow").is(':checked')){
saveAllRow();//保存所有行
}
var rowindex = $("#test tbody tr").length+1;
var str = "<tr><td>"+rowindex+"</td><td><input type='text'></td><td><input type='text'></td><td><input type='text'></td><td><a>保存</a><a>删除</a></td></tr>";
$("#test tbody").append(str);
registerClick();//注册表格操作点击事件
}
//修改行
function updateRow(t){
$(t).text("保存");
var tr = $(t).parent().parent();
var tds = $(tr).children();
for (var i = 0; i < tds.length; i++) {
if(i>0 && i<tds.length-1){
var td = tds[i];
var text = $(td).text();
$(td).html("<input type='text' value='"+text+"'>");
}
}
}
//保存行
function saveRow(t){
$(t).text("修改");
var tr = $(t).parent().parent();
var tds = $(tr).children();
for (var i = 0; i < tds.length; i++) {
if(i>0 && i<tds.length-1){
var td = tds[i];
var text = $(td).children("input").val();
$(td).html(text);
}
}
}
//删除行
function deleteRow(t){
if(confirm("是否删除行?")){
var tr = $(t).parent().parent();
$(tr).remove();
resetSerialNum();//重置序号
}
}
//新增行前保存所有行
function saveAllRow(){
var trs = $("#test tbody tr");
for (var i = 0; i < trs.length; i++) {
if($(trs[i]).children("td:nth-child(5)").children("a:nth-child(1)").text() == "保存"){
$(trs[i]).children("td:nth-child(5)").children("a:nth-child(1)").click();
}
}
}
//重置序号
function resetSerialNum(){
var trs = $("#test tbody tr");
for (var i=0;i<trs.length;i++) {
$("#test tbody tr:nth-child("+(i+1)+") td:nth-child(1)").text(i+1);
}
}
</script>
</body>
</html>代码简单，学学练练。仅供参考。