Falso loop de Ajax.

/*
##############
#   BY PHX   #
##############
*/
d = document;

function loop(page, element_id, speed) {
    FRM = "FRM_" + new Date().getTime();
    ajax = d.createElement("iframe");
    ajax.src = page;
    ajax.id = FRM;
    ajax.style.display = "none";
    d.head.appendChild(ajax);
    ajax.onload = function () {
        d.getElementById(element_id).innerHTML = (d.getElementById(FRM).contentWindow.document.body.innerHTML);
        setTimeout("loop(page, element_id, speed)", speed * 1000);
    };
};
loop('/tal_pag.php', 'id_do_elemento', 3);