1 files changed, 24 insertions, 6 deletions
diff --git a/js/utility.js b/js/utility.js
index a59841f..fe1d0f1 100644
--- a/js/utility.js
+++ b/js/utility.js
@@ -5,10 +5,28 @@
  * @param {Number} max
  * @return {Number}
  */
-Math.rangeInt = function(min, max){
-	if (max == undefined) {
-		max = min;
-		min = 0;
-	}
-	return Math.floor(Math.random() * (max - min + 1)) + min;
+if (typeof Math.rangeInt != 'function') {
+  Math.rangeInt = function(min, max){
+  	if (max == undefined) {
+  		max = min;
+  		min = 0;
+  	}
+  	return Math.floor(Math.random() * (max - min + 1)) + min;
+  }
+}
+
+/**
+ * Mege two objects
+ *
+ * @param {Object} o1 Object 1
+ * @param {Object} o2 Object 2
+ * @return {Object}
+ */
+if (typeof Object.merge != 'function') {
+  Object.merge = function(o1, o2) {
+    for (var i in o1) {
+      o2[i] = o1[i];
+    }
+    return o2;
+  }
 }