function popUp(adr,w,h){
	var x = (screen.width/2)-(w/2);
	var y = (screen.height/2)-(h/2);
	var newWin = window.open(adr,"_blank","width="+w+",height="+h+",menubar=no,location=no,resizable=yes,scrollbars=yes,toolbar=no");
	newWin.moveTo(x,y);
}// end popUp(string)