(function($) {
 $.fn.toPrice = function(cipher) {
  var strb, len, revslice;
  
  strb = $(this).val().toString();
  strb = strb.replace(/,/g, '');
  strb = $(this).getOnlyNumeric();
  strb = parseInt(strb, 10);
  if(isNaN(strb))
   return $(this).val('');
   
  strb = strb.toString();
  len = strb.length;
 
  if(len < 4)
   return $(this).val(strb);
 
  if(cipher == undefined || !isNumeric(cipher))
   cipher = 3;
 
  count = len/cipher;
  slice = new Array();
 
  for(var i=0; i<count; ++i) {
   if(i*cipher >= len)
    break;
   slice[i] = strb.slice((i+1) * -cipher, len - (i*cipher));
  }
 
  revslice = slice.reverse();
  return $(this).val(revslice.join(','));
 }
 
 $.fn.getOnlyNumeric = function(data) {
  var chrTmp, strTmp;
  var len, str;
  
  if(data == undefined) {
   str = $(this).val();
  }
  else {
   str = data;
  }
 
  len = str.length;
  strTmp = '';
  
  for(var i=0; i<len; ++i) {
   chrTmp = str.charCodeAt(i);
   if((chrTmp > 47 || chrTmp <= 31) && chrTmp < 58) {
    strTmp = strTmp + String.fromCharCode(chrTmp);
   }
  }
  
  if(data == undefined)
   return strTmp;
  else 
   return $(this).val(strTmp);
 }
 
 var isNumeric = function(data) {
  var len, chrTmp;
 
  len = data.length;
  for(var i=0; i<len; ++i) {
   chrTmp = str.charCodeAt(i);
   if((chrTmp <= 47 && chrTmp > 31) || chrTmp >= 58) {
    return false;
   }
  }
 
  return true;
 }
})(jQuery);