Js gets an instance of the option selected by the checkbox checkbox

There are countless examples of javascript fetching checkbox checkboxes.
Js:

var form = document.getElementById("form2");

var field = form.elements["test2"];
var option = Dining.getSelectedOption(form, field);
var message = "";
for (var i = 0, len = option.length; i < len; i++) {
message += "Select id:" + option[i].id + "nSelected name:" + option[i].name + "nSelected value:" + option[i].value + "nn";
}
alert(message);

getSelectedOption: function (selectform, selectionfield) {
var result = [];
var option = null;
for (var i = 0; i < selectionfield.length; i++) {
option = selectionfield[i];
if (option.checked) {
result.push(option);
} www.jb51.net

}
return result;

}
<form id='form2'>

<label> Sorting: </label><input id='aaaaa' type='checkbox' name='test2' value='1'>

<label for='aaaaa'> In sales </label><input id='bbbbb' type='checkbox' name='test2' value='2'>

<label for='bbbbb'> score </label><input id='ccccc' type='checkbox' name='test2' value='3'>

<label for='ccccc'> preferential </label> <br style='clear:both'><label> Classification: </label><input id='ddddd' type='checkbox' name='test2' value='4'>

<label for='ddddd'> Business plan </label><input id='eeeee' type='checkbox' name='test2' value='5'>

<label for='eeeee'> Cold dishes </label><input id='fffff' type='checkbox' name='test2' value='6'>

</form>",