function PopupBanner($id)
{
	center_x = (screen.width - 600)/2;
	center_y = (screen.height - 400)/2;

	window.open($id, "Banner", "top=" + center_y + ", left=" + center_x + ", width=600, height=400, scrollbars=yes, status=no");
}

function PopupWebmail()
{
        w = 796;
		  h = 546;

        window.open("webmail/", "Webmail", 'top=0, left=0, width=' + w + ',height=' + h + ',status=no,scrollbars=yes');
}

function center_popup_nosid(doc, nome, w, h, scroll)
{
        center_x = (screen.width - w)/2;
        center_y = (screen.height - h)/2;

        window.open(doc, nome, 'top=' + center_y + ',left=' + center_x + ',width=' + w + ',height=' + h + ',status=no,scrollbars=' + scroll);
}

function center_popup_nosid2(doc, nome, w, h, scroll)
{
        center_x = (screen.width - w)/2;
        center_y = (screen.height - h)/2;

        window.open(doc, nome, 'top=' + center_y + ',left=' + center_x + ',width=' + w + ',height=' + h + ',status=no,scrollbars=' + scroll);
}