全 选 与 反 选 操 作
电动机2019-03-30 20:17:08210<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
.box{
width:80px;
height: 250px;
margin: 50px auto;
padding: 0px 10px;
border-radius: 5px;
border: 1px solid #ccc
}
.box div{
border-bottom: 1px solid #000;
padding-bottom: 10px;
}
.box input{
margin:10px;
}
</style>
<script type="text/javascript">
function checkAll(){
var checkall=document.getElementById("checkall")
var 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 class="box">
<div>
<input type="checkbox" id="checkall" onclick="checkAll()" ><label for="checkall">全选</label>
</div>
<input type="checkbox" name="item">选项1<br>
<input type="checkbox" name="item">选项2<br>
<input type="checkbox" name="item">选项3<br>
<input type="checkbox" name="item">选项4<br>
<input type="checkbox" name="item">选项5<br>
<input type="checkbox" name="item">选项6<br>
</div>
</body>
</html>