diff --git a/main/plugin/hotspot/hotspot.js b/main/plugin/hotspot/hotspot.js
index e60bdaf099..2295b0c48e 100644
--- a/main/plugin/hotspot/hotspot.js
+++ b/main/plugin/hotspot/hotspot.js
@@ -29,6 +29,15 @@ function updateFlashVar()
 	flashVar++;
 }
 
+/*
+ * Save the results of the positioning of a point by the user on top of
+ * the answer area.
+ * @param   int     Question ID
+ * @param   int     ID of the area (square or ellipse)
+ * @param   int     Whether the answer is correct or not
+ * @param   int     X-coordinate (horizontal) of the answer point
+ * @param   int     Y-coordinate (vertical) of the answer point 
+ */
 function saveHotspot(question_id, hotspot_id, answer, hotspot_x, hotspot_y)
 {
 	newHotspot = document.createElement("input");
@@ -43,13 +52,20 @@ function saveHotspot(question_id, hotspot_id, answer, hotspot_x, hotspot_y)
 	newHotspot.value = answer;	
 	document.frm_exercise.appendChild(newHotspot);
 }
-
+/*
+ * Save the results of the positioning of a point by the user on top of
+ * the answer area ( for polygons and delineation )
+ * @param   int     Question ID
+ * @param   int     ID of the area (square or ellipse)
+ * @param   int     Whether the answer is correct or not
+ * @param   array   Coordinates (horizontal+vertical) of the answer points, in an array
+ */
 function saveDelineationUserAnswer(question_id, hotspot_id, answer, coordinates)
 {
 	newHotspot = document.createElement("input");
 	newHotspot.type = "hidden";
 	newHotspot.name = "hotspot["+question_id+"]["+hotspot_id+"]";
-	newHotspot.value = coordinates;	
+	newHotspot.value = coordinates;
 	document.frm_exercise.appendChild(newHotspot);
 	
 	newHotspot = document.createElement("input");