diff --git a/editablegrid_utils.js b/editablegrid_utils.js
index 16d4f2a..f45406a 100644
--- a/editablegrid_utils.js
+++ b/editablegrid_utils.js
@@ -124,8 +124,15 @@ EditableGrid.prototype.sort_alpha = function(a,b)
 	if (!a[0] && !b[0]) return 0;
 	if (a[0] && !b[0]) return 1;
 	if (!a[0] && b[0]) return -1;
-	if (a[0].toLowerCase()==b[0].toLowerCase()) return 0;
-	return a[0].toLowerCase().localeCompare(b[0].toLowerCase());
+
+    if (isNaN(a[0])) {
+        if (a[0].toLowerCase()==b[0].toLowerCase()) return 0;
+        return a[0].toLowerCase().localeCompare(b[0].toLowerCase());
+	} else {
+        if (a[0] === b[0]) return 0;
+        if (a[0] > b[0]) return 1;
+        return -1;
+	}
 };
 
 EditableGrid.prototype.sort_date = function(a,b)