Spin Button Date Picker Example: Fix incrementing and decrementing pa…

…st limits (pull #1154)

Fixes the following bugs in the date picker spin button example:
1. The day would show NaN when decrementing past the min value or incrementing past the max value.
2. The year would show NaN when setting to min or max with home or end keys.
3. The year could be set beyond the min or max year by incrementing or decrementing.

examples/spinbutton/js/spinbutton-date.js

@@ -35,10 +35,10 @@ var SpinButtonDate = function (domNode, values, callback)  {
     }
   }
   else {
-    this.valueMin  = parseInt(domNode.getAttribute('aria-valuemin'));
-    this.valueMax  = parseInt(domNode.getAttribute('aria-valuemax'));
-    this.valueNow  = parseInt(domNode.getAttribute('aria-valuenow'));
-    this.valueText = domNode.getAttribute('aria-valuenow');
+    this.valueMin  = parseInt(this.spinbuttonNode.getAttribute('aria-valuemin'));
+    this.valueMax  = parseInt(this.spinbuttonNode.getAttribute('aria-valuemax'));
+    this.valueNow  = parseInt(this.spinbuttonNode.getAttribute('aria-valuenow'));
+    this.valueText = this.spinbuttonNode.getAttribute('aria-valuenow');
   }
 
   this.keyCode = Object.freeze({