diff --git a/src/js/onlyNumbers-directive.js b/src/js/onlyNumbers-directive.js
new file mode 100644
index 0000000..1c6c9e5
--- /dev/null
+++ b/src/js/onlyNumbers-directive.js
@@ -0,0 +1,25 @@
+angular.module('focaDirectivas')
+  .directive('onlyNumbers', function () {
+    return {
+      restrict: 'A',
+      link: function (scope, elm, attrs, ctrl) {
+        elm.on('keydown', function (event) {
+          if (event.shiftKey) { event.preventDefault(); return false; }
+          //console.log(event.which);
+          if ([8, 13, 27, 37, 38, 39, 40].indexOf(event.which) > -1) {
+            // backspace, enter, escape, arrows
+            return true;
+          } else if (
+            event.which >= 48 && event.which <= 57 ||
+            event.which >= 96 && event.which <= 105
+          ) {
+            // numbers 0 to 9 or numpad number
+            return true;
+          } else {
+            event.preventDefault();
+            return false;
+          }
+        });
+      }
+    }
+  });