<a href="http://hainantravel.me/maps/hainan_map.html?dadunhgai&yalongbay&h_y">ссылка</a>
var q = window.location.search;
var arr = q.slice(1).split('&');
var i = document.querySelectorAll('input[type="checkbox"]');
i.forEach(function(a) {
arr.forEach(function(b) {
var v = a.getAttribute('value');
if(v == b) {
a.checked = true;
}
});
});