var timer1;
function cleartime() {
    clearTimeout(timer1);
}
function hideitA() {
    document.getElementById('banner_main_a').className = 'promobox-show';
    document.getElementById('banner_main_b').className = 'promobox-hide';
    document.getElementById('banner_main_c').className = 'promobox-hide';
    document.getElementById('banner_main_d').className = 'promobox-hide';
    timer1 = setTimeout("hideitB()", 5000);
}
function hideitB() {
    document.getElementById('banner_main_b').className = 'promobox-show';
    document.getElementById('banner_main_a').className = 'promobox-hide';
    document.getElementById('banner_main_c').className = 'promobox-hide';
    document.getElementById('banner_main_d').className = 'promobox-hide';
    timer1 = setTimeout("hideitC()", 5000);
}
function hideitC() {
    document.getElementById('banner_main_c').className = 'promobox-show';
    document.getElementById('banner_main_a').className = 'promobox-hide';
    document.getElementById('banner_main_b').className = 'promobox-hide';
    document.getElementById('banner_main_d').className = 'promobox-hide';
    timer1 = setTimeout("hideitD()", 5000);
}
function hideitD() {
    document.getElementById('banner_main_d').className = 'promobox-show';
    document.getElementById('banner_main_a').className = 'promobox-hide';
    document.getElementById('banner_main_b').className = 'promobox-hide';
    document.getElementById('banner_main_c').className = 'promobox-hide';
    timer1 = setTimeout("hideitA()", 5000);
}

window.onload = function () {
    setTimeout("hideitA()", 1000);
};