function popup(url) {
	params  = 'width='+screen.width;
	params += ', height='+screen.height;
	params += ', top=0, left=0'
	params += ', fullscreen=yes';

	newwin=window.open(url,'windowname4', params);
	if (window.focus) {newwin.focus()}
	return false;
}

function popup_amigo() {
	var w = 740;
	var h = 425;

	params  = 'width='+w;
	params += ', height='+h;
	params += ', top='+(screen.width - w) / 2;
	params += ', left='+(screen.height - h) / 2;
	params += ', fullscreen=no, scrollbars=no, resizable=no';

	newwin=window.open('amigo.php','Amigo', params);
	if (window.focus) {newwin.focus()}
}