Added setTimeout(), clearTimeout(), setInterval() and clearInterval() functions so javascript programmers familiar with these functions can use them in Minecraft

docs/api.md

@@ -232,6 +232,38 @@ See [issue #69][issue69] for more information.
 
 [issue69]: https://github.com/walterhiggins/ScriptCraft/issues/69
 
+setTimeout() function
+---------------------
+
+This function mimics the setTimeout() function used in browser-based javascript.
+However, the function will only accept a function reference, not a string of javascript code.
+Where setTimeout() in the browser returns a numeric value which can be subsequently passed to 
+clearTimeout(), This implementation returns a [BukkitTask][btdoc] object which can be subsequently passed to ScriptCraft's own clearTimeout() implementation.
+
+If Node.js supports setTimeout() then it's probably good for ScriptCraft to support it too.
+
+[btdoc]: http://jd.bukkit.org/beta/apidocs/org/bukkit/scheduler/BukkitTask.html
+
+clearTimeout() function
+---------------------
+A scriptcraft implementation of clearTimeout().
+
+setInterval() function
+---------------------
+
+This function mimics the setInterval() function used in browser-based javascript.
+However, the function will only accept a function reference, not a string of javascript code.
+Where setInterval() in the browser returns a numeric value which can be subsequently passed to 
+clearInterval(), This implementation returns a [BukkitTask][btdoc] object which can be subsequently passed to ScriptCraft's own clearInterval() implementation.
+
+If Node.js supports setInterval() then it's probably good for ScriptCraft to support it too.
+
+[btdoc]: http://jd.bukkit.org/beta/apidocs/org/bukkit/scheduler/BukkitTask.html
+
+clearInterval() function
+---------------------
+A scriptcraft implementation of clearInterval().
+
 Drone Module
 ============
 The Drone is a convenience class for building. It can be used for...

src/main/javascript/core/_scriptcraft.js

@@ -698,7 +698,70 @@ See [issue #69][issue69] for more information.
     global.command = _command;
     global._onTabComplete = __onTabCompleteJS;
     global.addUnloadHandler = _addUnloadHandler;
+
+/*************************************************************************
+setTimeout() function
+---------------------
+
+This function mimics the setTimeout() function used in browser-based javascript.
+However, the function will only accept a function reference, not a string of javascript code.
+Where setTimeout() in the browser returns a numeric value which can be subsequently passed to 
+clearTimeout(), This implementation returns a [BukkitTask][btdoc] object which can be subsequently passed to ScriptCraft's own clearTimeout() implementation.
+
+If Node.js supports setTimeout() then it's probably good for ScriptCraft to support it too.
+
+[btdoc]: http://jd.bukkit.org/beta/apidocs/org/bukkit/scheduler/BukkitTask.html
+
+***/
+    global.setTimeout = function( callback, delayInMillis){
+        //
+        // javascript programmers familiar with setTimeout know that it expects
+        // a delay in milliseconds. However, bukkit's scheduler expects a delay in ticks 
+        // (where 1 tick = 1/20th second)
+        //
+        var bukkitTask = server.scheduler.runTaskLater(__plugin, callback, delayInMillis/50);
+        return bukkitTask;
+    };
     
+/*************************************************************************
+clearTimeout() function
+---------------------
+A scriptcraft implementation of clearTimeout().
+
+***/
+    global.clearTimeout = function(bukkitTask){
+        bukkitTask.cancel();
+    };
+
+/*************************************************************************
+setInterval() function
+---------------------
+
+This function mimics the setInterval() function used in browser-based javascript.
+However, the function will only accept a function reference, not a string of javascript code.
+Where setInterval() in the browser returns a numeric value which can be subsequently passed to 
+clearInterval(), This implementation returns a [BukkitTask][btdoc] object which can be subsequently passed to ScriptCraft's own clearInterval() implementation.
+
+If Node.js supports setInterval() then it's probably good for ScriptCraft to support it too.
+
+[btdoc]: http://jd.bukkit.org/beta/apidocs/org/bukkit/scheduler/BukkitTask.html
+
+***/
+    global.setInterval = function(callback, intervalInMillis){
+        var delay = intervalInMillis/ 50;
+        var bukkitTask = server.scheduler.runTaskTimer(__plugin, callback, delay, delay);
+        return bukkitTask;
+    };
+/*************************************************************************
+clearInterval() function
+---------------------
+A scriptcraft implementation of clearInterval().
+
+***/
+    global.clearInterval = function(bukkitTask){
+        bukkitTask.cancel();
+    };
+
     //
     // assumes this was loaded from js-plugins/core/
     // load all of the plugins.