var marqueeObj;
function animate() {
    var newLeft = parseInt(marqueeObj.style.left) - 1;
    marqueeObj.style.left = newLeft + 'px';
}

window.onload = function () {
    var uls = document.getElementsByTagName('li');
    var tmpUL;
    for (var i = 0; i < uls.length; i++) {
        if (uls[i].className == 'current') {
            tmpUL = uls[i];
            break;
        } //if
    } //for
    
    if (tmpUL) {
        marqueeObj = tmpUL.getElementsByTagName('ul')[0];
        marqueeObj.style.left = 0
        setInterval(animate, 20);
    } //if
} //onload