Convert numbers from 0-999 into english words

WordifyNumbers.js

// may want to use "Nil" instead of "Zero" in some cases
var units = new Array ("Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen");
var tens = new Array ("Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety");

function num(it) {
  if (isNaN(it)) {
    return it;
  };
  var theword = "";
  var started;
  if (it>999) { 
    return "Lots"; 
  }
  if (it==0) { 
    return units[0]; 
  }
  for (var i = 9; i >= 1; i--) {
    if (it>=i*100) {
      theword += units[i];
      started = 1;
      theword += " hundred";
      if (it!=i*100) {
        theword += " and ";
      }
      it -= i*100;
      i=0;
    }
  };
  
  for (var i = 9; i >= 2; i--) {
    if (it>=i*10) {
      theword += (started?tens[i-2].toLowerCase():tens[i-2]);
      started = 1;
      if (it!=i*10) {
        theword += "-";
      }
      it -= i*10;
      i=0
    }
  };
  
  for (var i=1; i < 20; i++) {
    if (it==i) {
      theword += (started?units[i].toLowerCase():units[i]);
    }
  };
  return theword;
}