Here you can find the source of fromDecimal()
// Method to decode a decimal string // '83 101 116 104'.fromDecimal(); returns 'Seth' String.prototype.fromDecimal = function() { for (var dec = this.split(' '), i = 0, $ = '', d; d = dec[i]; i++) $ += String.fromCharCode(d); return $;//from w w w .j a va2 s .co m };