var fading = 'in';

function fade_in(tag_id) {
    if (fading == 'out') {
        Effect.toggle(tag_id,'appear');
        fading = 'in';
    }
}

function fade_out(tag_id) {
    if (fading == 'in') {
        Effect.toggle(tag_id,'appear');
        fading = 'out';
    }
}

function setCookie(c_name, value, expiredays)
{
    var exdate = new Date();
    exdate.setDate(exdate.getDate() + expiredays);
    document.cookie = c_name + "=" + escape(value)
                  + ((expiredays == null) ? ""
                                          : ";expires=" + exdate.toGMTString());
}

function getCookie(c_name)
{
    if (document.cookie.length > 0) {
        c_start = document.cookie.indexOf(c_name + "=");
        if (c_start != -1) { 
            c_start = c_start + c_name.length + 1; 
            c_end   = document.cookie.indexOf(";", c_start);
            if (c_end == -1) {
                c_end = document.cookie.length;
            }
            return unescape(document.cookie.substring(c_start, c_end));
        } 
    }
    return "";
}