js 获取复选框的值

复选框

<input type="checkbox" name="GroupName" value="1">
<input type="checkbox" name="GroupName" value="2">
<input type="checkbox" name="GroupName" value="3">
<input type="checkbox" name="GroupName" value="4">
<input type="checkbox" name="GroupName" value="5">

js 代码

var obj = document.getElementsByName('GroupName');
var str = "";
for (var i = 0; i < obj.length; i++) {
if (obj[i].checked) {
str += obj[i].value + ",";
}
}