function popup(width, height, adres){
	if (parseInt (navigator.appVersion) >= 4 ){
		X=(screen.width  - width)/2;
		Y=(screen.height - height)/2;
	}
	else {
		X=250;
		Y=100;
	}
	popupWin = window.open(adres, 'imagewin', 'location=0,resizable=yes,scrollbars=yes,width='+width+',height='+height+',top='+Y+',left='+X);
	return false;
}