dl.js

var downloadURL = function(a) {
    var b = "hiddenDownloader" + (+new Date()),
        c = document.getElementById(b);
    null === c && (c = document.createElement("iframe"), c.id = b, c.style.display = "none", document.body.appendChild(c)), c.src = a
};
window.zips = document.querySelectorAll('a.tutLink[href$=zip]');
var i = 0;
for (var i; i < window.zips.length; i++) {
    var zip = window.zips[i];
    downloadURL(zip.href);
}