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<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
* {
padding: 0;
margin: 0;
}
.wrap {
width: 300px;
margin: 100px auto 0;
}
table {
border-collapse: collapse;
border-spacing: 0;
border: 1px solid #c0c0c0;
width: 300px;
}
th,
td {
border: 1px solid #d0d0d0;
color: #404060;
padding: 10px;
}
th {
background-color: #09c;
font: bold 16px "微软雅黑";
color: #fff;
}
td {
font: 14px "微软雅黑";
}
tbody tr {
background-color: #f0f0f0;
}
tbody tr:hover {
cursor: pointer;
background-color: #fafafa;
}
</style>
</head>
<body>
<div class="wrap">
<table>
<thead>
<tr>
<th>
<input type="checkbox" id="j_cbAll"/>
</th>
<th>菜名</th>
<th>饭店</th>
</tr>
</thead>
<tbody id="j_tb">
<tr>
<td>
<input type="checkbox"/>
</td>
<td>红烧肉</td>
<td>田老师</td>
</tr>
<tr>
<td>
<input type="checkbox"/>
</td>
<td>西红柿鸡蛋</td>
<td>田老师</td>
</tr>
<tr>
<td>
<input type="checkbox"/>
</td>
<td>鱼香肉丝</td>
<td>田老师</td>
</tr>
<tr>
<td>
<input type="checkbox"/>
</td>
<td>小葱拌豆腐</td>
<td>田老师</td>
</tr>
</tbody>
</table>
</div>
<script>
var cksAll=document.getElementById('j_cbAll');
var cks = document.getElementById('j_tb').getElementsByTagName("input");
cksAll.onclick=function() {
for (var i = 0; i < cks.length; i++) {
cks[i].checked=this.checked;
}
};
for(var i=0;i<cks.length;i++){
cks[i].onclick=function(){
var flag=true;
for(var j=0;j<cks.length;j++){
if(!cks[j].checked){
flag=false;
break;
}
}
cksAll.checked=flag;
};
}
</script>
</body>
</html>
全选和不全选》.html