function announcement(){
xoffset = (screen.width-547)/2;
yoffset = (screen.height-386)/2;
myPopup=window.open("http://nbcalvary.org/announcement.html","_blank",'menubar=no,resizeable=no,scrollbars=no, status=0,location=0,titlebar=no, toolbar=no,width=547,height=386')
myPopup.moveTo(xoffset,yoffset);
}