A better setInterval for Javascript

var runs = 1;
function yourActionFunction() {
    var log = document.getElementById("log");
    log.innerHTML += runs+". running again!
";
    return runs++ < 5;
}

/** This is a new setInterval function */
(function(time) {
   function again() {
        var procede = yourActionFunction();
        if(procede)
            setTimeout(again, time);
   }
   again(time);
})(5000);