<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>获取所有 type为checkbox的元素</title>
</head>
<body>
<form action="">
<input type="text">
<input type="checkbox">
<input type="button" name="" value="按钮">
<input type="checkbox" name="">
<input type="checkbox" >
<input type="radio" name="">
</form>
</body>
<script type="text/javascript">
var inputs=document.getElementsByTagName("input"); //获取所有的input标签对象
var checkboxArray=[]; //初始化空数组，用来存放checkbox对象
for(var i=0;i<inputs.length;i++){
var obj=inputs[i];
if(obj.type=='checkbox'){
checkboxArray.push(obj);
obj.checked=true;
}
}
</script>
</html>
