Neighbours

function checkIfBigger(n, array) {

    var index = parseInt(n);
    var arrParsed = parseArr(array);
    var arr = arrParsed.split(",");
    var output = "";


    if(index == 0) {

        if(arr.length != 1) {

            if(parseInt(arr[index]) > parseInt(arr[index + 1])) {

                output = "No left neighbour, but <span style='color: red;'>BIGGER</span> than the right neighbour!";
            }
            else if(parseInt(arr[index]) == parseInt(arr[index + 1])) {

                output = "No left neighbour and <span style='color: red;'>EQUAL</span> to the right neighbour!";
            }
            else {

                output = "No left neighbour and <span style='color: red;'>SMALLER</span> than the right neighbour!";
            }
        }
        else {

            output = "No neighbours!";
        }
    }
    else if(index == (arr.length - 1)) {

        if(arr.length != 1) {

            if(parseInt(arr[index]) > parseInt(arr[index - 1])) {

                output = "No right neighbour, but <span style='color: red;'>BIGGER</span> than the left neighbour!";
            }
            else if(parseInt(arr[index]) == parseInt(arr[index - 1])) {

                output = "No right neighbour and <span style='color: red;'>EQUAL</span> to the left neighbour!";
            }
            else {

                output = "No right neighbour and <span style='color: red;'>SMALLER</span> than the left neighbour!";
            }
        }
        else {

            output = "No neighbours!";
        }
    }
    else if(index > 0 && index < (arr.length - 1)) {

        if(arr[index] > arr[index - 1]) {

            if(arr[index] > arr[index + 1]) {

                output = "The number is <span style='color: red;'>BIGGER</span> than its two neighbours!";
            }
            else if(arr[index] < arr[index + 1]) {

                output = "The number is <span style='color: red;'>BIGGER</span> than its left neighbour, but <span style='color: red;'>SMALLER</span> than its right neighbour!";
            }
            else {

                output = "The number is <span style='color: red;'>BIGGER</span> than its left neighbour and <span style='color: red;'>EQUAL</span> to its right neighbour!";
            }
        }
        if(arr[index] < arr[index - 1]) {

            if(arr[index] < arr[index + 1]) {

                output = "The number is <span style='color: red;'>SMALLER</span> than its two neighbours!";
            }
            else if(arr[index] > arr[index + 1]) {

                output = "The number is <span style='color: red;'>SMALLER</span> than its left neighbour, but <span style='color: red;'>BIGGER</span> than its right neighbour!";
            }
            else {

                output = "The number is <span style='color: red;'>SMALLER</span> than its left neighbour and <span style='color: red;'>EQUAL</span> to its right neighbour!";
            }
        }
        if(arr[index] == arr[index - 1]) {

            if(arr[index] == arr[index + 1]) {

                output = "The number is <span style='color: red;'>EQUAL</span> to its two neighbours!";
            }
            else if(arr[index] > arr[index + 1]) {

                output = "The number is <span style='color: red;'>EQUAL</span> than its left neighbour, but <span style='color: red;'>BIGGER</span> than its right neighbour!";
            }
            else {

                output = "The number is <span style='color: red;'>EQUAL</span> than its left neighbour and <span style='color: red;'>BIGGER</span> to its right neighbour!";
            }
        }
    }

    return output;
}