ADD: esc button handler on rating page

~dev_rating/media/js/rating.js

 var $ = jQuery;
 
 $(function() {
+    var cancelFlag = false;
 
     function AdjustTable() {
         var jWrap = $('div.main_layer');
@@ -182,12 +183,23 @@ $(function() {
 
     function Rating(jThis, oldRate) {
         oldRate = parseInt(oldRate);
+
         // Здесь jThis - div rateCell, а не input, который является дочкой
+        if (cancelFlag) {
+            var str = ""
+            if (oldRate != -1)
+                str = oldRate;
+            jThis.children("input").val(str);
+            cancelFlag = false;
+            return;
+        }
+
         jThis.children("input").attr("disabled", true);
 
         var newRate = 0;
         if (jThis.children("input").val() !== "")
             newRate = parseInt(jThis.children("input").val());
+
         if (newRate == oldRate)
             return;
 
@@ -386,7 +398,9 @@ $(function() {
         var col = g_col;
         var direction;
         switch (e.keyCode) {
+            case 27: cancelFlag = true; // esc
             case 13: // enter
+            case 40: // down arrow
                 direction = Direction.Down;
                 break;
             case 38: // up arrow
@@ -395,9 +409,6 @@ $(function() {
             case 39: // right arrow
                 direction = Direction.Right;
                 break;
-            case 40: // down arrow
-                direction = Direction.Down;
-                break;
             case 37: // left arrow
                 direction = Direction.Left;
                 break;
@@ -430,6 +441,7 @@ $(function() {
 
     // Нажатие на чекбокс "Неявка"
     $(".absenceCheck").click(function(event) {
+
         controlRowVisualization($(this).parent().parent());
     });