String.prototype.repeat = function(x) {
var str = "";
for (var repeats = 0; repeats < x; repeats++) str = str + this;
return str;
}
Number.prototype.digitsToString = function(digits) {
if (this == 0) return ("0".repeat(digits));
var dec = this / (Math.pow(10, digits));
var str = dec.toString().substring(2, dec.toString().length);
return str;
};