1function palindrome(str) {
2
3    var len = str.length;
4    var mid = Math.floor(len/2);
5
6    for ( var i = 0; i < mid; i++ ) {
7        if (str[i] !== str[len - 1 - i]) {
8            return false;
9        }
10    }
11
12    return true;
13}
14

1//Palindrome in Javascript using the stack data structure
2function isPalindrome(word) {
3    let s = new Stack();
4    for (let i = 0; i < word.length; i++) {
5        s.push(word[i]);
6    }
7
8    let rword = "";
9    while (s.length()>0){
10        rword += s.pop();
11    }
12    if (word ==rword){
13        return true
14    } else {
15        return false
16    }
17}