javascript replace multiple letters

Hi. In order to pass parameters in AJAX, when calling function from js file, special characters like /  ' '(space)  ,  #  , ... they have to be encoded.

I use

codigo = codigo.toUpperCase().replace(/[ ]/g, "_").replace(/[#]/g, "NN").replace(/[/]/g, "ZZZZZZZ")

to make these replacements:

(space) ==> _
# ==> "NN"
/ ==> >"ZZZZZZZ"

I have other procedure I get these names as IDS, so I need to decode these values back, but for example, I use this to decode it:

xcodss = xcods.substring(0,nlen).replace(/["NN"]/g,"#").replace(/[_]/g, " ").replace(/["ZZZZZZZ"]/g, "/");
       
but where I have "Z" , i get / in return
  where I would be expecting only one / if I had 7 Zs (ZZZZZZZ)

for example, if I have "N", then I get #
aguisaAsked:
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aguisaAuthor Commented:
ok, the reason is that I'm using the code of an item as the ID of the javascript object.

for example, an Item can have the code:    "#10", so I assign the alias: NN10, and name the object representing this item on the ID='NN10'
so, now in Javascript I can do things like:

$("#NN10").val(...)

The thing is that if I didn't do the replacement, then in Javascript, I would have things like:

$("##10").val(....) which makes some errors, also lets say another code:   "1034 12V"

note the space, now back in JS
, things like  

$("#1034 12V").html(...) would also cause errors, contrary to

$("#1034_12V").html(...)

I appreciate the very good first recommendation, but its falls from being the best approach in my case, lets say I use it, then again, in JS things like (for the item with code= "#10", i.e.)
 
$("#%2310).html(...) Js dont like.

please correct me. thanks
leakim971MultitechnicianCommented:
When you escape special characters, the server receive them unescaped. So when you get the characters back in the browser you get them in the original format (unescaped)
TRW-ConsultingCommented:
Try changing:

  xcodss = xcods.substring(0,nlen).replace(/["NN"]/g,"#").replace(/[_]/g, " ").replace(/["ZZZZZZZ"]/g, "/");

To

  xcodss = xcods.substring(0,nlen).replace(/NN/g,"#").replace(/_/g, " ").replace(/ZZZZZZZ/g, "/");

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