function price_in_words(price) {
  var sglDigit = ["Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine"],
    dblDigit = ["Ten", "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen"],
    tensPlace = ["", "Ten", "Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"],
    handle_tens = function(dgt, prevDgt) {
      return 0 == dgt ? "" : " " + (1 == dgt ? dblDigit[prevDgt] : tensPlace[dgt])
    },
    handle_utlc = function(dgt, nxtDgt, denom) {
      return (0 != dgt && 1 != nxtDgt ? " " + sglDigit[dgt] : "") + (0 != nxtDgt || dgt > 0 ? " " + denom : "")
    };

  var str = "",
    digitIdx = 0,
    digit = 0,
    nxtDigit = 0,
    words = [];
  if (price += "", isNaN(parseInt(price))) str = "";
  else if (parseInt(price) > 0 && price.length <= 10) {
    for (digitIdx = price.length - 1; digitIdx >= 0; digitIdx--) switch (digit = price[digitIdx] - 0, nxtDigit = digitIdx > 0 ? price[digitIdx - 1] - 0 : 0, price.length - digitIdx - 1) {
      case 0:
        words.push(handle_utlc(digit, nxtDigit, ""));
        break;
      case 1:
        words.push(handle_tens(digit, price[digitIdx + 1]));
        break;
      case 2:
        words.push(0 != digit ? " " + sglDigit[digit] + " Hundred" + (0 != price[digitIdx + 1] && 0 != price[digitIdx + 2] ? " and" : "") : "");
        break;
      case 3:
        words.push(handle_utlc(digit, nxtDigit, "Thousand"));
        break;
      case 4:
        words.push(handle_tens(digit, price[digitIdx + 1]));
        break;
      case 5:
        words.push(handle_utlc(digit, nxtDigit, "Lakh"));
        break;
      case 6:
        words.push(handle_tens(digit, price[digitIdx + 1]));
        break;
      case 7:
        words.push(handle_utlc(digit, nxtDigit, "Crore"));
        break;
      case 8:
        words.push(handle_tens(digit, price[digitIdx + 1]));
        break;
      case 9:
        words.push(0 != digit ? " " + sglDigit[digit] + " Hundred" + (0 != price[digitIdx + 1] || 0 != price[digitIdx + 2] ? " and" : " Crore") : "")
    }
    str = words.reverse().join("")
  } else str = "";
  return str

}

console.log(price_in_words(1250000000));
console.log(price_in_words(9999999999));