How to search through international characters (accents) with chosen?

Does anyone could help me to find a fix for searching through international (greek in my case) characters using chosen?

For example, I have the following multiselect:

Παράδειγμα
Παραδειγμα

If I search for "παρα" it will give me only the second word.

I know that this is not possible through reg_exp,

I found the following function on the internet but I am really no good at javascript in ordrer to embed/call it.

I would really appreciate your help.

function stripVowelAccent(str)
{
 var rExps=[
 {re:/[\xC0-\xC6]/g, ch:'A'},
 {re:/[\xE0-\xE6]/g, ch:'a'},
 {re:/[\xC8-\xCB]/g, ch:'E'},
 {re:/[\xE8-\xEB]/g, ch:'e'},
 {re:/[\xCC-\xCF]/g, ch:'I'},
 {re:/[\xEC-\xEF]/g, ch:'i'},
 {re:/[\xD2-\xD6]/g, ch:'O'},
 {re:/[\xF2-\xF6]/g, ch:'o'},
 {re:/[\xD9-\xDC]/g, ch:'U'},
 {re:/[\xF9-\xFC]/g, ch:'u'},
 {re:/[\xD1]/g, ch:'N'},
 {re:/[\xF1]/g, ch:'n'} ];

 for(var i=0, len=rExps.length; i<len; i++)
  str=str.replace(rExps[i].re, rExps[i].ch);

 return str;
} 

Thanks in advance,
Mike