javascript全选
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>javascript全选</title>
<style type="text/css">
.checkall{width: 120px;height: 200px;border: 1px solid #000; border-radius: 5px;
padding: 20px 20px;margin: 20px auto;}
.checkall div{padding-bottom: 10px;border-bottom: 1px solid #000;}
input{margin: 8px;}
</style>
<script type="text/javascript">
function checkAll() {
var checkall,item;
checkall=document.getElementById('checkall');
item=document.getElementsByName('item[]')
for (var i=0;i<item.length;i++) {
if(checkall.checked){
item[i].checked=true
}else{
item[i].checked=false
}
}
}
</script>
</head>
<body>
<div>
<div><input type="checkbox" id="checkall" onclick="checkAll()"><label for="checkall">全选</label></div>
<input type="checkbox" name="item[]"><label>选项1</label><br>
<input type="checkbox" name="item[]"><label>选项2</label><br>
<input type="checkbox" name="item[]"><label>选项3</label><br>
<input type="checkbox" name="item[]"><label>选项4</label><br>
<input type="checkbox" name="item[]"><label>选项5</label><br>
<input type="checkbox" name="item[]"><label>选项6</label>
</div>
</body>
</html>