How to write palindrome in JavaScript

Question

I wonder how to write palindrome in javascript, where I input different words and program shows if word is palindrome or not. For example word noon is palindrome, while bad

Answer 1

I am not sure how this JSPerf check the code performance. I just tried to reverse the string & check the values. Please comment about the Pros & Cons of this method.

function palindrome(str) {
    var re = str.split(''),
        reArr = re.slice(0).reverse();

    for (a = 0; a < re.length; a++) {
        if (re[a] == reArr[a]) {
            return false;
        } else {
            return true;
        }
    }
}

JS Perf test