function popupi(href, w, h){
	var pos_x = (screen.width - w) / 2;
	var pos_y = (screen.height - h) / 2;
	window.open(href, '', 'width='+w+',height='+h+',scrollbars=0,menubar=0,status=1,toolbar=0,left='+pos_x+',screenX='+pos_x+',top='+pos_y+',screenY='+pos_y);
	return false;
}