测试页面checkbox.html的代码：
<!DOCTYPE html>
<html>
<head>
<title>Get ALl CheckBox</title>
<style type="text/css">
h2 {
text-align:center
}
</style>
</head>
<body>
<h2>CheckBox<h2/>
<form class="form-h">
<div class="input-c">
<input type="checkbox" class="in" id="in1"/>
<div>
<div class="input-c">
<input type="checkbox" class="in" id="in2"/>
<div>
<div class="input-c">
<input type="checkbox" class="in" id="in3"/>
<div>
<div class="input-c">
<input type="checkbox" class="in" id="in4"/>
<div>
<div class="input-c">
<input type="checkbox" class="in" id="in5"/>
<div>
</form>
</body>
</html>
