Make chronological link with correct paging

<a id="chronLink" href="/search?max-results=7#order=ASC">Articles in chronological order</a>
<script style="text/javascript">
var chronPerPage = 7;
function makeChronLink(json) {
    var link = "/search?updated-max="+encodeURIComponent(json.feed.entry[0].published.$t.replace(/\.\d{3}/, ""))+"&max-results="+chronPerPage+"#order=ASC";
    var a = document.getElementById('chronLink');
    if(a) a.href = link;
}
function chronNumberOfPosts(json) {
    var count = parseInt(json.feed.openSearch$totalResults.$t);
    var sc = document.createElement('script');
    sc.type = 'text/javascript';
    var pgcount = count % chronPerPage;
    if(!pgcount) pgcount = chronPerPage;
    sc.src = "/feeds/posts/default?start-index="+(count - pgcount)+"&max-results=1&redirect=false&alt=json-in-script&callback=makeChronLink"+ "&_hash="+Math.random();
    document.getElementsByTagName('head')[0].appendChild(sc);
}
function doChronLink() {
    var sc = document.createElement('script');
    sc.type = 'text/javascript';
    sc.src = "/feeds/posts/default?alt=json-in-script&redirect=false&max-results=1&callback=chronNumberOfPosts";
    document.getElementsByTagName('head')[0].appendChild(sc);
}
window.addEventListener ? window.addEventListener("load",doChronLink,false) : window.attachEvent && window.attachEvent("onload",doChronLink);
</script>