Add documentation for common functions

diff --git a/game.js b/game.js
index 6f22939..f1eb61d 100644
--- a/game.js
+++ b/game.js
@@ -9,24 +9,32 @@
   * Frise Game Library
   */
 /**
- *
+ * Common Global Functions
  */
 /**
- *
+ * Returns an Element object from the current document which has the provided
+ * id.
+ * @param {String} id of element trying to get an object for
+ * @return {Element} desired element if exists, else null
  */
 function elt(id)
 {
     return document.getElementById(id);
 }
 /**
- *
+ * Returns a collection of objects for Element's that match the provided Element
+ * name in the current document.
+ * @param {String} name of HTML/XML Element that want from current document
+ * @return {HTMLCollection} of matching Element's
  */
 function tag(name)
 {
     return document.getElementsByTagName(name);
 }
 /**
- *
+ * Returns a list of Node's which match the CSS selector string provided.
+ * @param {String} a CSS selector string to match against current document
+ * @return {NodeList} of matching Element's
  */
 function sel(selector)
 {
@@ -88,8 +96,8 @@ function makeGameObjects(tag_objects)
 }
 /**
  * Upper cases first letter of a string
- * @param String str string to upper case first letter of
- * @return String result of uppercasing
+ * @param {String} str string to upper case first letter of
+ * @return {String} result of upper-casing
  */
 function upperFirst(str)
 {
@@ -101,7 +109,7 @@ function upperFirst(str)
 }
 /**
  * Used as part of the closure of makeGameObject so as that every game
- * object has an id.
+ * object has an integer id.
  */
 var object_counter = 0;
 function makeGameObject(dom_object)
@@ -154,6 +162,9 @@ function makeGameObject(dom_object)
     game_object.type = type;
     return game_object;
 }
+/**
+ *
+ */
 function toggleDisplay(id, display_type)
 {
     if (display_type === undefined) {
@@ -172,6 +183,9 @@ function toggleDisplay(id, display_type)
         obj.setAttribute('aria-hidden', false);
     }
 }
+/**
+ *
+ */
 function toggleOptions(elt_id, stop_pos)
 {
     let game_content = elt('game-content');
@@ -285,6 +299,9 @@ function interpolateVariables(text)
     }
     return text;
 }
+/**
+ *
+ */
 class Location
 {
     present = [];
@@ -394,6 +411,9 @@ class Location
         return section;
     }
 }
+/**
+ *
+ */
 class Game
 {
     timestamp;