loadSubscribedArticles.js

var lsaCall = [0];

function loadSubscribedArticles(i, tag, Author) {
    var int,
        self = this;
        
    console.log("called with i=" + i);
    if (typeof lsaCall[i] === "undefined" || lsaCall[i] === 0) {
        console.log("first-time block ran");
        lsaCall[i] = 1;
        int = self.setInterval(
            "loadSubscribedArticles('" + i + "', '" + tag + "', '" + Author + "')",
            1000
        );
    }
}

loadSubscribedArticles(0, "", "");
loadSubscribedArticles(1, "", "");