Отформатировать цену на js

      function number_format (number, decimals, dec_point, thousands_sep) {
         var i, j, kw, kd, km;

         if (isNaN(decimals = Math.abs(decimals))) {
            decimals = 2;
         }
         if (dec_point == undefined) {
            dec_point = ",";
         }
         if (thousands_sep == undefined) {
            thousands_sep = ".";
         }

         i = parseInt(number = (+number || 0).toFixed(decimals)) + "";

         if ((j = i.length) > 3) {
            j = j % 3;
         } else {
            j = 0;
         }

         km = (j ? i.substr(0, j) + thousands_sep : "");
         kw = i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + thousands_sep);
         //kd = (decimals ? dec_point + Math.abs(number - i).toFixed(decimals).slice(2) : "");
         kd = (decimals ? dec_point + Math.abs(number - i).toFixed(decimals).replace(/-/, 0).slice(2) : "");

         return km + kw + kd;
      }