描述：通过javascript控制表格的奇数行和偶数行的颜色不一样，鼠标经过的时候，颜色变成白色，鼠标离开，颜色恢复原来的颜色。并且封装好了函数，适用于网页中所有的表格。
实现代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>高级隔行变色</title>
<style>
*{
padding: 0;
margin: 0;
}
.form{
width: 500px;
margin: 100px auto 0;
}
table{
border-collapse: collapse;
border-spacing: 0;
border: 1px solid #404060;
width: 500px;
text-align: center;
}
th,td{
border: 1px solid #404060;
padding: 10px;
}
th {
background-color: #09c;
font: bold 16px "微软雅黑";
color: #fff;
}
</style>
</head>
<body>
<div class="form">
<table>
<thead>
<tr>
<th>学号</th>
<th>姓名</th>
<th>成绩</th>
</tr>
</thead>
<tbody class="target">
<tr>
<td>001</td>
<td>赵武</td>
<td>100</td>
</tr>
<tr>
<td>002</td>
<td>赵武</td>
<td>100</td>
</tr>
<tr>
<td>003</td>
<td>赵武</td>
<td>100</td>
</tr>
<tr>
<td>004</td>
<td>赵武</td>
<td>100</td>
</tr>
<tr>
<td>005</td>
<td>赵武</td>
<td>100</td>
</tr>
<tr>
<td>006</td>
<td>赵武</td>
<td>100</td>
</tr>
<tr>
<td>007</td>
<td>赵武</td>
<td>100</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>
<script>
var tbody = document.getElementsByClassName("target");
for(var i = 0;i<tbody.length;i++){
changeColor(tbody[i]);
}
function changeColor(ele) {
var trArr = ele.children;
for (var i = 0;i<trArr.length;i++){
if(i%2!==0){
trArr[i].style.background = "#a3a3a3";
}else{
trArr[i].style.background = "#ccc";
}
var color = "";
trArr[i].onmouseover = function () {
color = this.style.background;
this.style.background = "#fff";
}
trArr[i].onmouseout = function () {
this.style.background = color;
}
}
}
</script>