// JavaScript below

function popup(url, target, width, height, features)
{
    var wnd;
    var features1;


    features1 = 'width=' + width + ',height=' + height;
    if (screen)
        features1 += ',left=' + (screen.width - width) / 2 +
                ',top=' + (screen.height - height) /2;
    if (features)
        features1 += ',' + features;

    wnd = window.open(url, target, features1);
    wnd.focus();
}



function set_cookie(name, value, expires, path, domain, secure)
{
    document.cookie = name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
}

function get_cookie(name)
{
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1) {
        begin = dc.indexOf(prefix);
        if (begin != 0) return null;
    } else {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1) {
        end = dc.length;
    }
    return unescape(dc.substring(begin + prefix.length, end));
}

function delete_cookie(name, path, domain)
{
    if (get_cookie(name)) {
        document.cookie = name + "=" +
            ((path) ? "; path=" + path : "") +
            ((domain) ? "; domain=" + domain : "") +
            "; expires=Thu, 01-Jan-70 00:00:01 GMT";
    }
}