<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
#table {
width: 400px;
border-collapse: collapse;
}
</style>
</head>
<body>
<table id="table" border="1">
<thead>
<td>ID</td>
<td>姓名</td>
<td>年齡</td>
</thead>
<tbody>
<tr>
<td>1</td>
<td>黃藝</td>
<td>20</td>
</tr>
<tr>
<td>2</td>
<td>張三</td>
<td>21</td>
</tr>
<tr>
<td>3</td>
<td>李四</td>
<td>22</td>
</tr>
<tr>
<td>4</td>
<td>網無</td>
<td>23</td>
</tr>
</tbody>
</table>
</body>
<script type="text/javascript">
// 實現隔行變色，鼠標移入高亮
var table = document.getElementById("table");
var oldColor = "";//聲明一個變量，保存表格原來的顏色
for(var i = 0; i < table.tBodies[0].rows.length; i++) {
//使用判斷實現隔行變色
if(i % 2 == 0) {
table.tBodies[0].rows[i].style.backgroundColor = "gray";
} else {
table.tBodies[0].rows[i].style.backgroundColor = "#ccc";
}
//實現鼠標移入高亮
table.tBodies[0].rows[i].onmouseover = function() {
oldColor = this.style.backgroundColor;
this.style.backgroundColor = "red";
}
//實現鼠標移出變回原來的顏色
table.tBodies[0].rows[i].onmouseout = function() {
this.style.backgroundColor = oldColor;
}
}
</script>
</html>