HTML Code
<input type="button" id="save" value="save" onclick="save()"/>
<input type="button" id="clear" value="delete" onclick="clear()"/>
<input type="checkbox" id="check">Check and Save!</input>
JS Code
function save(){
var checkbox = document.getElementById('check');
localStorage.setItem('checkbox1zaal1', checkbox.checked);
}
function load(){
var checked = JSON.parse(localStorage.getItem('check'));
if (checked == true) { document.getElementById("check").checked = true; }
}
function clear(){
location.reload();
localStorage.clear()
}