function setWeekendAndHoliday(y,m) {
    var elements = document.getElementsByTagName("table");
    for (j = 0; j < elements.length; j++) {
        var element = elements[j].getAttribute("summary");
        var year = element.split("/")[0];
        var month = element.split("/")[1];
        if(!(year == y && month == m)){
            continue;
        }
        var spans = elements[j].getElementsByTagName("span");
        var day;
        for (i = 0; i < spans.length; i++) {
            if (spans[i].parentNode.nodeName == "TD") {
                if(spans[i].innerHTML.indexOf("href") != -1){
                    day = spans[i].getElementsByTagName("a")[0].innerHTML;
                } else {
                    day = spans[i].innerHTML;
                }
                if (isHoliday(year, month, day)) {
                    spans[i].setAttribute('class', 'holiday');
                    spans[i].setAttribute('className', 'holiday');
                } else if(isSaturday(year, month, day)) {
                    spans[i].setAttribute('class', 'saturday');
                 spans[i].setAttribute('className', 'saturday');
                }
                if (isToday(year, month, day)) {
                    spans[i].parentNode.setAttribute('class', 'today');
                    spans[i].parentNode.setAttribute('className', 'today');
                }
            }
        }
    }
}