get palindrome function in javascript

getPalindromes.js

function getPalindromes(s) {
    /* get all palindromes of the string s */
    var results = [];
    for (var i = 0; i < s.length; i++) {
        var start, end;
        start = end = i;
        //check 'odd' palindromes
        while ( 0 <= start && end < s.length && s[start] == s[end] ) {
            results.push(s.substring(start, end + 1));
            start--;
            end++;
        }

        //check 'even' palindromes
        start = i;
        end = i + 1;
        while ( 0 <= start && end < s.length && s[start] == s[end] ) {
            results.push(s.substring(start, end + 1));
            start--;
            end++;
        }
    }
    return results;
}

function countPalindromes(s) { 
    /* count palindromes of the string s */
    var results = getPalindromes(s);
    return results.length;
}