1、cellpadding：边距指的是表格的单元格的内容与单元格边界之间空白距离的大小。
2、cellspacing：可设置或返回在表格中的单元格之间的空白量（表格中各个单元格之间的距离）（以像素为单位）。
3、实例
（1）未使用cellpadding与cellspacing
<!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=gb2312" />
<title>祖先后代选择器</title>
<script type="text/javascript" src="jquery-2.0.3.js"></script>
<style type="text/css">
body{
100%;
height:100%;
font-size:18px;
}
.tab{
1280px;
height:500px;
text-align:center;
background-color:#CCFFFF;
border:1px solid #660099;
padding-left:20px;
}
tr th{
color:#FFFFFF;
background-color:#000000;
border: 1px solid #CC0066;
}
tr td{
border: 1px solid #FF0000;
}
</style>
<script type="text/javascript">
$(function(){
//设置button按钮距离表格的距离
$("form input").css("margin-top","20px");
//设置button字体的粗细，运用到祖先后代选择器
$("form input").css("font-weight","bold");
//设置input里的宽度，运用到祖先后代选择器
$("form input").css("width","140px;");
//button点击事件
$("input[type='button']").click(function(){
//实现偶数行背景色变色
$("tr:even").css("background-color","#00DD00");
//实现偶数行字体变色
$("tr:even").css("color","#FF0000");
});
});
</script>
</head>
<body>
<form name="form" style="text-align:center;">
<table class="tab">
<tr>
<th>书号</th>
<th>书名</th>
<th>数量</th>
<th>作者</th>
<th>单价</th>
<th>总价</th>
</tr>
<tr id="tr_td">
<td>CN-2312</td>
<td>Web开发</td>
<td>20</td>
<td>赵钱孙</td>
<td>50.00</td>
<td>1000.00</td>
</tr>
<tr>
<td>CN-2313</td>
<td>C++程序设计</td>
<td>100</td>
<td>李华强</td>
<td>40.00</td>
<td>4000.00</td>
</tr>
<tr>
<td>CN-2321</td>
<td>Java程序设计</td>
<td>200</td>
<td>武德成</td>
<td>30.00</td>
<td>6000.00</td>
</tr>
<tr>
<td>CN-2398</td>
<td>JQuery</td>
<td>50</td>
<td>赵钱孙</td>
<td>50.00</td>
<td>2500.00</td>
</tr>
<tr>
<td>CN-2328</td>
<td>Java高级编程</td>
<td>200</td>
<td>武德成</td>
<td>30.00</td>
<td>6000.00</td>
</tr>
<tr>
<td>CN-2358</td>
<td>JQuery实战</td>
<td>50</td>
<td>赵小孙</td>
<td>50.00</td>
<td>2500.00</td>
</tr>
<tr>
<td>CN-1328</td>
<td>Java编程</td>
<td>200</td>
<td>魏忠贤</td>
<td>30.00</td>
<td>6000.00</td>
</tr>
<tr>
<td>CN-4358</td>
<td>JQuery基础教程</td>
<td>50</td>
<td>赵小孙</td>
<td>50.00</td>
<td>2500.00</td>
</tr>
<tr>
<td>CN-4568</td>
<td>JSP实例开发</td>
<td>200</td>
<td>李佳後</td>
<td>30.00</td>
<td>6000.00</td>
</tr>
<tr>
<td>CN-6988</td>
<td>Servlet</td>
<td>50</td>
<td>李玉华</td>
<td>50.00</td>
<td>2500.00</td>
</tr>
</table>
<input type="button" id="click" name="click" value="点击"/>
</form>
</body>
</html>
（3）使用cellpadding与cellspacing
<!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=gb2312" />
<title>祖先后代选择器</title>
<script type="text/javascript" src="jquery-2.0.3.js"></script>
<style type="text/css">
body{
100%;
height:100%;
font-size:18px;
}
.tab{
1280px;
height:500px;
text-align:center;
background-color:#CCFFFF;
border:1px solid #660099;
padding-left:20px;
}
tr th{
color:#FFFFFF;
background-color:#000000;
border: 1px solid #CC0066;
}
tr td{
border: 1px solid #FF0000;
}
</style>
<script type="text/javascript">
$(function(){
//设置button按钮距离表格的距离
$("form input").css("margin-top","20px");
//设置button字体的粗细，运用到祖先后代选择器
$("form input").css("font-weight","bold");
//设置input里的宽度，运用到祖先后代选择器
$("form input").css("width","140px;");
//button点击事件
$("input[type='button']").click(function(){
//实现偶数行背景色变色
$("tr:even").css("background-color","#00DD00");
//实现偶数行字体变色
$("tr:even").css("color","#FF0000");
});
});
</script>
</head>
<body>
<form name="form" style="text-align:center;">
<table class="tab" cellpadding="0" cellspacing="0">
<tr>
<th>书号</th>
<th>书名</th>
<th>数量</th>
<th>作者</th>
<th>单价</th>
<th>总价</th>
</tr>
<tr id="tr_td">
<td>CN-2312</td>
<td>Web开发</td>
<td>20</td>
<td>赵钱孙</td>
<td>50.00</td>
<td>1000.00</td>
</tr>
<tr>
<td>CN-2313</td>
<td>C++程序设计</td>
<td>100</td>
<td>李华强</td>
<td>40.00</td>
<td>4000.00</td>
</tr>
<tr>
<td>CN-2321</td>
<td>Java程序设计</td>
<td>200</td>
<td>武德成</td>
<td>30.00</td>
<td>6000.00</td>
</tr>
<tr>
<td>CN-2398</td>
<td>JQuery</td>
<td>50</td>
<td>赵钱孙</td>
<td>50.00</td>
<td>2500.00</td>
</tr>
<tr>
<td>CN-2328</td>
<td>Java高级编程</td>
<td>200</td>
<td>武德成</td>
<td>30.00</td>
<td>6000.00</td>
</tr>
<tr>
<td>CN-2358</td>
<td>JQuery实战</td>
<td>50</td>
<td>赵小孙</td>
<td>50.00</td>
<td>2500.00</td>
</tr>
<tr>
<td>CN-1328</td>
<td>Java编程</td>
<td>200</td>
<td>魏忠贤</td>
<td>30.00</td>
<td>6000.00</td>
</tr>
<tr>
<td>CN-4358</td>
<td>JQuery基础教程</td>
<td>50</td>
<td>赵小孙</td>
<td>50.00</td>
<td>2500.00</td>
</tr>
<tr>
<td>CN-4568</td>
<td>JSP实例开发</td>
<td>200</td>
<td>李佳後</td>
<td>30.00</td>
<td>6000.00</td>
</tr>
<tr>
<td>CN-6988</td>
<td>Servlet</td>
<td>50</td>
<td>李玉华</td>
<td>50.00</td>
<td>2500.00</td>
</tr>
</table>
<input type="button" id="click" name="click" value="点击"/>
</form>
</body>
</html>
