Chromium user-script to automatically refresh Outlook Web Access mailbox

gistfile1.js

// ==UserScript==
// @match <target-url>
// ==/UserScript==

var interval = 60; // seconds

var links = document.links;
for (var i=0; i<links.length; i++) {
    if (links[i].textContent && links[i].textContent.trim() == "Check Messages") {
        var cm_link = links[i];
        function refresh_f() {
            cm_link.onclick();
        };
        window.setInterval(refresh_f, interval*1000);
        break;
    }
}