FUNCTION vu_vox_showeclipGrid, F,ut,zero_lng,earthlng,cntr, dvox, obj_val,lngrange,latrange
;+
; NAME:
;	vu_vox_showeclipgrid
; PURPOSE:
;	Internal use by vu_vox only
; CATEGORY:
;	Volume Pro board
; INCLUDE:
	@compile_opt.pro			; On error, return to caller
; CALLS:
;	 vu_vox_drawelatitude,vu_vox_drawelongitude
; CALLED BY:
;	 vu_vox
; MODIFICATION HISTORY:
;	JUL-2002, Cindy Wang
;-
FOR I=round(latrange[0]/20),round(latrange[1]/20) DO BEGIN
	lat = I*20
	F = vu_vox_drawelatitude(F,ut,zero_lng,lat,cntr, dvox, obj_val)
ENDFOR

;mark the earth longitude
FOR I=-2,2 DO $
	F = vu_vox_drawelongitude(F,ut,zero_lng,earthlng,I,cntr,dvox,obj_val)

FOR J=round(lngrange[0]/20),round(lngrange[1]/20) DO BEGIN
	lng = J*20
 	F = vu_vox_drawelongitude(F,ut,zero_lng,earthlng,lng,cntr,dvox,obj_val)
ENDFOR

RETURN, F  &  END