HTMLCollection.prototype.map = function(fn) {
var results = [];
for (var idx = 0; idx < this.length; idx++) {
results.push(fn(this.item(idx)));
}
return results;
};
HTMLCollection.prototype.forEach = function(fn) {
for (var idx = 0; idx < this.length; idx++) {
fn(this.item(idx));
}
};