Added comments

ranker.js

@@ -1,25 +1,28 @@
 $(document).ready(function() {
+    // Base URL for DMOJ user info API
     var base_url = "https://dmoj.ca/api/user/info/";
 
     // Read users from mcpt.ca/ranks/users.json
     $.getJSON("users.json", function(users) {
+        // Read users from mcpt.ca/ranks/problems.json
         $.getJSON("problems.json", function(problems) {
-            var weight = {};
-            var points = {};
+            var weight = {}; // Weight of each problem
+            var points = {}; // Number of points received by this user for this problem
 
-            for(var p = 0; p < problems.length; p++)
+            for(var p = 0; p < problems.length; p++) // All the added problems
                 weight[problems[p].code] = problems[p].points;
 
             for(var u = 0; u < users.length; u++) {
                 var curp = 0;
+                // Gets the specific user json
                 $.getJSON(base_url + users[u] + '?format=json', function(info) {
                     var solved = JSON.parse(info).solved_problems;
                     for(var s = 0; s < solved.length; s++) {
                         if(weight.hasOwnProperty(solved[s]))
                             curp += weight[solved[s]];
                     }
                     points[users[u]] = curp;
-                    alert(users[u] + " " + curp);
+                    // alert(users[u] + " " + curp);
                 });
             }
         });