function onCheckItem()

[0] Fix | Delete

{

[1] Fix | Delete

for (let i = 0; i < document.form.elements.length; ++i) {

[2] Fix | Delete

if (document.form.elements[i].type === 'checkbox') {

[3] Fix | Delete

document.form.elements[i].checked = document.form.all.checked === true;

[4] Fix | Delete

}

[5] Fix | Delete

}

[6] Fix | Delete

}

[7] Fix | Delete