var win= null;
function NewWindow(mypage,myname,w,h,scrollb){
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
  var settings  ='height='+h+',';
  settings +='width='+w+',';
  settings +='top='+wint+',';
      settings +='left='+winl+',';
	  settings +='scrollbars='+scrollb+',';
      settings +='resizable=no';
  win=window.open(mypage,myname,settings);
  if(parseInt(navigator.appVersion) >= 4){win.window.focus();}
}