gistfile1.js

var old = Array.from;
try {
        old(document.html.childNodes);
} catch(e){
        Array.from = function(item, slice){
		if (typeOf(item) == 'collection'){
			var l = item.length, array = new Array(l - slice), i = slice - 1;
			while (++i < l) array[i] = item[i];
			return array;
		}
		return old(item, slice);
	};
}