function newWindow(obsah,width,height) {
		mapa_tisk=window.open(obsah,'detail','scrollbars=no,resizable=yes,resize=yes,width='+width+',height='+height+',screenX='+getCenterW(width)+',screenY='+getCenterH(height)+',top='+getCenterH(height)+',left='+getCenterW(width));
		mapa_tisk.focus();
}
function getCenterW(width) {
	return parseInt( eval( (screen.width-parseInt(width))/2 ) );
}
function getCenterH(height) {
	return parseInt( eval( (screen.height-parseInt(height))/2 ) );
}

function popup(obsah,width,height) {
	okno=window.open(obsah,'detail','scrollbars=yes,resizable=no,resize=no,width='+width+',height='+height+',screenX='+getCenterW(width)+',screenY='+getCenterH(height)+',top='+getCenterH(height)+',left='+getCenterW(width));
	okno.focus();
}
function trackClick(id,ip)
{
        var img;
        img = new Image();
        img.src = "track_click.php?id="+id+"&ip="+ip;
        startTime = (new Date()).getTime();
        while (
                (!img.complete)
                && (((new Date).getTime() - startTime) < 500)
        );
        return true;
}