Javascipt - If statement inside a loop issues

function rot13(str) { 

var yahoo = [];

for (var i = 0; i < str.length; i++) {
    if (str.charCodeAt(i) > 64 && str.charCodeAt[i] < 91){continue;}{
        var cnet = str.charCodeAt(i);
        yahoo.push(cnet);
    } else {
      var j = str.charCodeAt(i);
        yahoo.push(j);
    }
}

var ugh = yahoo.toString();
return ugh;
}

rot13("SERR PBQR PNZC");

Attempting to use an if else statement inside a for loop and having some issues with the else statement (Getting "Syntax error: unexpected token else"). Main goal right now is to try to manipulate the strings alphabet characters while passing the other characters through (ie. spaces, exclamation points etc.). Sure there is an easier way of doing that but really just wondering what is the issue with writing an if else statement inside a loop and where im going wrong. Appreciate the help