Numbers to words

numbersToWords.js

//<input type"..." value="1265">
//1265
//one thousand two hundred sixty five

var names = [{"0":"zero","1":"one","2":"two","3":"three","4":"four","5":"five","6":"six","7":"seven","8":"eight","9":"nine" },{"0":"ten","1":"eleven","2":"twelve","3":"thirteen","4":"fourteen","5":"fifteen","6":"sixteen","7":"seventeen","8":"eighteen","9":"nineteen"},{"2":"twenty","3":"thirty","4":"forty","5":"fifty","6":"sixty","7":"seventy","8":"eighty","9":"ninety"},["","thousand","million","billion","trillion","quadrillion","quintillion","sextillion","septillion","octillion","nonillion","decillion","undecillion","duodecillion","tredecillion","quattuordecillion", "quindecillion","sexdecillion","septdecillion","octdecillion","novemdecillion","vigintillion"]];
var to_words = function(s, n){
    var ns = s.slice(0,3);
    return (ns.length < 1)?"":to_words(s.slice(3,s.length),n+1)+((ns.length>1)?((ns.length==3&&ns[2]!="0")?names[0][ns[2]]+" hundred "+((ns[1]=="1")?names[1][ns[0]]+" ":(ns[1]!="0")?names[2][ns[1]]+" "+((ns[0]!="0")?names[0][ns[0]]+" ":""):(ns[0]!="0"?names[0][ns[0]]+" ":"")):((ns[1]=="1")?names[1][ns[0]]+" ":(ns[1]!="0")?names[2][ns[1]]+" "+((ns[0]!="0")?names[0][ns[0]]+" ":""):(ns[0]!="0"?names[0][ns[0]]+" ":""))) + (((ns.length==3&&(ns[0]!="0"||ns[1]!="0"||ns[2]!="0"))||(ns.length==2&&(ns[0]!="0"||ns[1]!="0"))||(ns.length==1&&ns[0]!="0"))?"<span class='magnitude'>"+names[3][n]+"</span> ":""):((ns.length==1&&ns[0]!="0")?names[0][ns[0]]+" ":"") + (((ns.length==3&&(ns[0]!="0"||ns[1]!="0"||ns[2]!="0"))||(ns.length==2&&(ns[0]!="0"||ns[1]!="0"))||(ns.length==1&&ns[0]!="0"))?"<span class='magnitude'>"+names[3][n]+"</span> ":""));
}, input;
document.getElementById('input').addEventListener('keyup', function(){
    document.getElementById('output').innerHTML = to_words(this.value.replace(/[^0-9]/g, '').split('').reverse(), 0);
}, false);