function isPalindrome(str){
    return (str == reverse(str));
}

function reverse(str){
	var temp = "";
	for(var i=str.length-1;i>=0;i--){
		temp += str[i];
	}
	return temp;
}

console.log(isPalindrome("cat")); //return false
console.log(isPalindrome("lol")); // returns true