Add Random number generator node.

function/random/random.js

@@ -0,0 +1,35 @@
+/**
+ * Copyright 2014 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+
+module.exports = function(RED) {
+    "use strict";
+    function RandomNode(n) {
+        RED.nodes.createNode(this,n);
+        this.low = Number(n.low);
+        this.high = Number(n.high);
+        this.inte = n.inte;
+        var node = this;
+        this.on("input", function(msg) {
+            if (node.inte === "true") {
+                msg.payload = Math.round(Number(Math.random()) * (node.high - node.low + 1) + node.low - 0.5);
+            } else {
+                msg.payload = Number(Math.random()) * (node.high - node.low) + node.low;
+            }
+            node.send(msg);
+        });
+    }
+    RED.nodes.registerType("random",RandomNode);
+}