[SOLVED] How to encode/decode Arabic in JSON String in Javascript?

I want to first encode a JSON String (it has some Arabic words) and then decode it in my JavaScript file.

PS: This piece of code works fine if the JSON String has only English Words. But I want it to work for Arabic Words also.

Encoding:

<input type="hidden" id="cei-nav-urlparam-ceiIndex" value='<%= URLEncoder.encode(ceiIndexTree, "UTF-8") %>' />

Decoding:

   this.initFiltersValues = function(ceinavUrlPara) {
    ceinavUrlParams = unescape(ceinavUrlPara);
    ceinavUrlParams = ceinavUrlParams.replace(/\+/g, " ");
    var res = $.parseJSON(ceinavUrlParams);
    console.log('INITIAL FILTER FROM URL: '+ceinavUrlParams);
    return res;
   };