function formatNumber(n) {
      // format number 1000000 to 1,234,567
      return n.replace(/\D/g, "").replace(/\B(?=(\d{3})+(?!\d))/g, " ")
    }


    function formatCurrency(input, blur) {
      // appends $ to value, validates decimal side
      // and puts cursor back in right position.

      // get input value
      var input_val = input.val();

      // don't validate empty input
      if (input_val === "") { return; }

      // original length
      var original_len = input_val.length;

      // initial caret position
      var caret_pos = input.prop("selectionStart");

      // check for decimal
      if (input_val.indexOf(".") >= 0) {

        // get position of first decimal
        // this prevents multiple decimals from
        // being entered
        var decimal_pos = input_val.indexOf(".");

        // split number by decimal point
        var left_side = input_val.substring(0, decimal_pos);
        var right_side = input_val.substring(decimal_pos);

        // add commas to left side of number
        left_side = formatNumber(left_side);

        // validate right side
        right_side = formatNumber(right_side);

        // On blur make sure 2 numbers after decimal
        if (blur === "blur") {
          right_side += "00";
        }

        // Limit decimal to only 2 digits
        right_side = right_side.substring(0, 2);

        // join number by .
        input_val = left_side + "." + right_side;

      } else {
        // no decimal entered
        // add commas to number
        // remove all non-digits
        input_val = formatNumber(input_val);
        // input_val = "$" + input_val;

        // final formatting
        if (blur === "blur") {
          input_val += ".00";
        }
      }

      // send updated string to input
      input.val(input_val);

      // put caret back in the right position
      var updated_len = input_val.length;
      caret_pos = updated_len - original_len + caret_pos;
      // input[0].setSelectionRange(caret_pos, caret_pos);
    }