var alertTimerID = 0;
function swap1() {
    var obj = document.getElementById('headerimage');
    obj.src = "/images/mls_userarea_banner11904.jpg";
    obj.setAttribute("useMap","#header1");
    clearTimeout(alertTimerID);
    alertTimerID = setTimeout("swap2()", 6000);
}
function swap2() {
    var obj = document.getElementById('headerimage');
    obj.src = "/images/mls_userarea_banner219041.jpg";
    obj.setAttribute("useMap", "#header2");
    clearTimeout(alertTimerID);
    alertTimerID = setTimeout("swap3()", 6000);
}
function swap3() {
    var obj = document.getElementById('headerimage');
    obj.src = "/images/UserArea3.jpg";
    obj.setAttribute("useMap", "#header3");
    clearTimeout(alertTimerID);
    alertTimerID = setTimeout("swap1()", 6000);
}