function newpopup(site,w,h) {
	x = screen.availWidth / 2 - w / 2;
	y = screen.availHeight / 2 - h / 2;
	window.open (site,'_blank','width=' + w + ',height=' + h + ',left=' + x + ',top=' + y + ',screenX=' + x + ',screenY=' + y + ',scrollbars=yes,resizable=yes');
}