JavaScrip-—全选
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScrip-—全选</title>
<style type="text/css">
.box{ width:80px; height:150px; border: 1px solid #666; border-radius:5px; padding:5px 10px; margin:0px auto; box-shadow:2px 2px 5px #CCC;}
.box div{ border-bottom:1px solid #666; padding-bottom:5px;}
.box input{ margin:5px;}
</style>
<script type="text/javascript">
function aa(){
var aa,item;
aa=document.getElementById('aa')
item=document.getElementsByName("item[]")
for(var i=0;i<item.length;i++){
if(aa.checked){
item[i].checked=true
}else{
item[i].checked=false}
}
}
</script>
</head><body>
<div class="box">
<div> <input type="checkbox" id="aa" onClick="aa()"> <label for="aa">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>
</div>
</body>
</html>