javascript - How can i get html-escaped JSON data of unescaped JSON content -

how can html-escaped json data of

{ "timestamp":  1345719094,    "callback": "https://www.example.com/cloudinary_cors.html",   "signature": "7ac8c757e940d95f95495aa0f1cba89ef1a8aa7a",    "api_key": "1234567890" } 

for using :

<input name="file" type="file"         class="cloudinary-fileupload" data-cloudinary-field="image_upload"         data-form-data=" ... html-escaped json data ... " ></input> 

how can in html , javascript ?

in advance thanks.

depending on how want encode use either:

    element.setattribute('data-form-data', encodeuri(data)); 

or

    element.setattribute('data-form-data', encodeuricomponent(data)); 

didn't include json.stringify, on data first.