gistfile1.js

/* iterative fibonacci sequence O(n) */
            function fibo(n) {
				var fiboArr = [0, 1];
                for (var i = 1; i < n; i++) {
				    fiboArr.push(fiboArr[i - 1] + fiboArr[i]);
                }
                return fiboArr;
            }
			
			function fiboSum(n) {
			    var sum = 0, arr = fibo(n);
				for (var i = 0; i < arr.length; i++) {
				    if (arr[i] > n)
					    break;
			        if (arr[i] % 2 == 0) {
					    sum += arr[i];
				    }
				}
				return sum;
			}