Adds weekdays to date column in rbkwebs 2018 fixtures page

fixrbkweb.js

// ==UserScript==
// @name         Fixrbkweb
// @version      1.2.0.4
// @description  Legg til ukedager i rbkweb.no sin kampoversikt
// @author       Sinna mann
// @match        http://www.rbkweb.no/kamper2018.php
// ==/UserScript==

(function() {
    'use strict';


    //create an array of weekdays.
    var weekdays= ["Søn", "Man", "Tir", "Ons", "Tor", "Fre", "Lør"];

    var docs = document.getElementsByClassName("kamp");    //Find the elements in our table with the class name used for dates and tv information.
    //Iterate over all elements
    for (var i = 0; i < docs.length;i++){
        var mynode = docs[i].innerHTML;
        //Check if the element contains a date, by investigating if the first character is a number.
        if(!isNaN(mynode[0])) {

            var datenode=mynode.split("/"); //Split the result by / to separate day from month.
            var day = "";
            var month="";
            // Add a zero to one digit days and months.
            if (datenode[0].length<2){
                day = "0" + datenode[0];}
            else{
                day = datenode[0];
            }
            if (datenode[1].length<2){
                month = "0" +datenode[1];}
            else{
                month = datenode[1];
            }

            var mydatestring = "2018-" + month + "-" + day; //Concatinate year, month and day to create a valid date.
            var date = new Date(mydatestring);//convert date string to a date object
            var myday = date.getDay();//Get week day value from date object
            docs[i].innerHTML = weekdays[myday] +"&nbsp;"+ mynode; // Get weekday name from weekdays array and concatinate to beginning of date in table.
        }
    }

}
)();