function open_popup(dokument,sirka,vyska,centrovat,pozice_l,pozice_h) 
{
    if (centrovat == 1) {
        so = screen.width;
        vo = screen.height;
        zleva = ((so - sirka) / 2) - 13;
        shora = 100;

	} else {
        zleva = pozice_l;
        shora = pozice_h;
	}
    popup_win = window.open(dokument,"popup_okno","width="+sirka+",height="+vyska+",left="+zleva+",top="+shora+",location=0,menubar=0,resizable=0,scrollbars=1,status=0,titlebar=0,toolbar=0");
    popup_win.focus();

}

function open_popup2(dokument,sirka,vyska,centrovat,pozice_l,pozice_h) 
{
    if (centrovat == 1) {
        so = screen.width;
        vo = screen.height;
        zleva = ((so - sirka) / 2) - 13;
		shora = 100;
	} else {
        zleva = pozice_l;
        shora = pozice_h;
    }
    popup_win = window.open(dokument,"popup_okno","width="+sirka+",height="+vyska+",left="+zleva+",top="+shora+",location=0,menubar=0,resizable=0,scrollbars=0,status=0,titlebar=0,toolbar=0");
    popup_win.focus();
}