/**
 * Functions
 */
function pop(url, width, height, scrollbars, menubar)
{
    var w = new Popup(url, width, height, scrollbars, menubar);
    w.open();
};

/**
 * Classes
 */
function Popup(url, width, height, scrollbars, menubar)
{
    this.directories = 0;
    this.height      = height;
    this.location    = 0;
    this.menubar     = menubar;
    this.resizable   = 1;
    this.scrollbars  = scrollbars;
    this.status      = 0;
    this.toolbar     = 0;
    this.url         = url;
    this.width       = width;
    this.window      = null;
};

Popup.prototype.close = function()
{
    if (this.window && ! this.window.closed)
    {
        if (this.window.opener && ! this.window.opener.closed) this.window.opener.focus();
        this.window.close();
    }
};

Popup.prototype.features = function()
{
    features  = "directories=" + (this.directories ? 1 : 0);
    features += ",height="     + (this.height      ? parseInt(this.height) : 0);
    features += ",location="   + (this.location    ? 1 : 0);
    features += ",menubar="    + (this.menubar     ? 1 : 0);
    features += ",resizable="  + (this.resizable   ? 1 : 0);
    features += ",scrollbars=" + (this.scrollbars  ? 1 : 0);
    features += ",toolbar="    + (this.toolbar     ? 1 : 0);
    features += ",width="      + (this.width       ? parseInt(this.width) : 0);
    return features;
};

Popup.prototype.createName = function()
{
    u = this.url;
    i = u.lastIndexOf("/") + 1;
    return u.substring(i, u.indexOf(".", i));
};

Popup.prototype.open = function()
{
    this.close();
    this.window = window.open(this.url, this.createName(), this.features());
    if (this.window)
    {
        this.window.focus();
        if (this.window.opener == null) this.window.opener = self;
    }
};