表格全選，鼠標移動變色案例
!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>表格全選</title>
<style>
table{
border: 1px solid;
width: 500px;
margin-left: 30%;
}
td,th{
text-align: center;
border: 1px solid;
}
div{
margin-top: 10px;
margin-left: 30%;
}
.over{
background-color: purple;
}
.out{
background-color: pink;
}
</style>
</head>
<body>
<table>
<caption>學生信息表</caption>
<tr>
<th><input type="checkbox" name="cb" id="fristcb"></th>
<th>編號</th>
<th>姓名</th>
<th>性別</th>
<th>操作</th>
</tr>
<tr>
<td><input type="checkbox" name="cb"></td>
<td>1</td>
<td>葫蘆娃</td>
<td>男</td>
<td><a href="javascript:void(0);">刪除</a></td>
</tr>
<tr>
<td><input type="checkbox" name="cb"></td>
<td>2</td>
<td>爺爺</td>
<td>男</td>
<td><a href="javascript:void(0);">刪除</a></td>
</tr>
<tr>
<td><input type="checkbox"name="cb" ></td>
<td>3</td>
<td>妖精</td>
<td>?</td>
<td><a href="javascript:void(0);">刪除</a></td>
</tr>
</table>
<div>
<input type="button" id="selectAll" value="全選">
<input type="button" id="unSelectAll" value="全不選">
<input type="button" id="selectRev" value="反選">
</div>
<script>
window.onload = function() {
//創建全選事件
document.getElementById("selectAll").onclick = function () {
//找出所有的checkbox
var cbArray = document.getElementsByName("cb");
//遍歷
for (var i = 0; i < cbArray.length; i++) {
//3.設置每一個cbArray的狀態爲選中 checked
cbArray[i].checked = true;
}
}
document.getElementById("unSelectAll").onclick = function () {
//全不選
//找出所有的checkbox
var cbArray = document.getElementsByName("cb");
//遍歷
for (var i = 0; i < cbArray.length; i++) {
//設置每一個cb的狀態爲未選中 checked
cbArray[i].checked = false;
}
}
document.getElementById("selectRev").onclick = function () {
//反選
//找出所有的checkbox
var cbArray = document.getElementsByName("cb");
//遍歷
for (var i = 0; i < cbArray.length; i++) {
//設置每一個cb的狀態爲相反
cbArray[i].checked = !cbArray[i].checked;
}
}
document.getElementById("fristcb").onclick = function () {
//第一個cb點擊
//找出所有的checkbox
var cbArray = document.getElementsByName("cb");
//遍歷
for (var i = 0; i < cbArray.length; i++) {
//設置每一個cb的狀態和第一個cb狀態一樣
cbArray[i].checked =this.checked;
}
}
//給所有tr綁定鼠標移到元素之上和移出元素事件
var trs = document.getElementsByTagName("tr");
//遍歷tr
for(var i=0;i<trs.length;i++){
//移到元素之上
trs[i].onmouseover=function () {
this.className="over";
}
//移除元素
trs[i].onmouseout=function () {
this.className="out";
}
}
}
</script>
</body>
</html>
