<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>多选框全选/反选</title>
<script src="http://res01.xesimg.com/jquery/jquery.min.js"></script>
</head>
<body>
<div class="demo">
<ul id="list">
<li><label><input type="checkbox" value="1"> 1.时间都去哪儿了</label></li>
<li><label><input type="checkbox" value="2"> 2.海阔天空</label></li>
<li><label><input type="checkbox" value="3"> 3.真的爱你</label></li>
<li><label><input type="checkbox" value="4"> 4.不再犹豫</label></li>
<li><label><input type="checkbox" value="5"> 5.光辉岁月</label></li>
<li><label><input type="checkbox" value="6"> 6.喜欢妳</label></li>
</ul>
<input type="checkbox" id="all">
<input type="button" value="获得选中的所有值" class="btn" id="getValue">
</div>
</body>
</html>
<script type="text/javascript">
//全选或全不选
$("#all").click(function(){
console.log(this.checked)
if(this.checked){
$("#list :checkbox").prop("checked", true);
}else{
$("#list :checkbox").prop("checked", false);
}
});
//设置全选复选框
$("#list :checkbox").click(function(){
allchk();
});
//获取选中选项的值
$("#getValue").click(function(){
var valArr = new Array;
$("#list input[type=checkbox]:checked").each(function(i){
valArr[i] = $(this).val();
});
var vals = valArr.join(',');
alert(vals);
});
function allchk(){
var chknum = $("#list :checkbox").size();//选项总个数
var chk = 0;
$("#list :checkbox").each(function () {
if(this.checked){
chk++;
}
});
if(chknum==chk){//全选
$("#all").prop("checked", true);
}else{//不全选
$("#all").prop("checked", false);
}
}
</script>