036.js

// The decimal number, 585 = 1001001001(binary), is palindromic in both bases.

// Find the sum of all numbers, less than one million, which are palindromic in 
// base 10 and base 2.

// (Please note that the palindromic number, in either base, may not include 
// leading zeros.)

function isPalindromic(a) {
    var len = a.length;
    if (len === 0 || len === 1) return true;
    if (len === 2) return a[0] === a[1];
    if (a[0] !== a[len-1]) return false;
    return isPalindromic(a.splice(1, len-2));
}

function findPalindromicNumbersSum(max) {
    var sum = 0;
    while (max--) {
        if (!isPalindromic( (max+'').split('') )) continue;
        if (!isPalindromic( max.toString(2).split('') )) continue;
        sum += max;
    }
    return sum;
}

console.log( findPalindromicNumbersSum(1000000) );