Contest: 1 line of JS: Smallest Palindrome Checker

palindrome.js

/**
 * Check if a word or phrase is a palindrome in 106 characters of JavaScript.
 */
function isPalindrome(s) {
  return s.match(/[a-zA-Z]/g).join('').toLowerCase()==s.match(/[a-zA-Z]/g).reverse().join('').toLowerCase();
}