function NewWindow(mypage,myname,w,h,scroll) {
   var winl = (screen.width - w) /2;
   var wint = (screen.height - h) /2;
   winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable=yes'
   win = window.open(mypage,myname,winprops)
}