Output is NodeList, with few operation options
var linkList = document.querySelectorAll('a[href$=".zip"]');
var linkArray = new Array();
for (var i =0; i<linkList.length; i++){
linkArray.push(linkList[i]);
}
setInterval(function () {
var here = linkArray[0];
linkArray.shift();
here.click();
},1000)