public class BlockMenus implements DragClient {
	...
	private static const basicMathOps:Array = ['+', '-', '*', '/'];
	private static const comparisonOps:Array = ['<', '=', '>'];
	private static const positionOps:Array = ['xpos', 'ypos']; // 追加
	...

	public static function BlockMenuHandler(evt:MouseEvent, block:Block, blockArg:BlockArg = null, menuName:String = null):void {
		...
			if ((basicMathOps.indexOf(op)) > -1) { menuHandler.changeOpMenu(evt, basicMathOps); return; }
			if ((comparisonOps.indexOf(op)) > -1) { menuHandler.changeOpMenu(evt, comparisonOps); return; }
			if ((positionOps.indexOf(op)) > -1) { menuHandler.changeOpMenu(evt, positionOps); return; } // 追加
		...

public function changeOperator(newOp:String):void {
	// Used to switch among a family of related operators (e.g. +, -, *, and /).
	// Note: This does not deal with translation, so it only works for symbolic operators.
	for each (var item:* in labelsAndArgs) {
		if ((item is TextField) && (item.text == op)) item.text = newOp;
	}
	op = newOp;
	opFunction = null;
	fixArgLayout();
}

stage.frameRate = 30; // 60 にする

		primTable["getPenHue"] = function():* { return interp.targetSprite().penHue };
		primTable["getPenShade"] = function():* { return interp.targetSprite().penShade };
		primTable["getPenSize"] = function():* { return interp.targetSprite().penWidth };
		primTable["getPenState"] = function():* { return interp.targetSprite().penIsDown };

		["pen color",										"r", 4, "getPenHue"],
		["pen shade",										"r", 4, "getPenShade"],
		["pen size",										"r", 4, "getPenSize"],
		["-"],
		["is pen down?",								"b", 4, "getPenState"],

["if %n then %s else %s",               "r", 8, "ifThenString",         "",""],

primTable["ifThenString"] = function(b:*):*{return ""+(interp.arg(b,0)?interp.arg(b,1):interp.arg(b,2))};

["if %n then %s else %s",               "r", 8, "if:then:else:",         1,"A","B"],

		if (menuName == 'onOff') menuHandler.onOffMenu(evt);

		    handler.onOffMenu(evt);

    private function onOffMenu(evt:MouseEvent):void{
        var m:Menu = new Menu(setBlockArg,'onOff');
        m.addItem('off');
        m.addItem('on');
        showMenu(m);
     }

		primTable["isTurboMode"]        = function(b:*):*{return turboMode};
		primTable["setTurboMode"]       = function(b:*):*{turboMode = ('on' == arg(b,0));app.refreshScreen();};

		["turbo mode?",                         "b", 6, "isTurboMode"],
		["set turbo mode to %m.onOff",          " ", 6, "setTurboMode","on"],

		["turbo mode?",                         "b", 106, "isTurboMode"],
		["set turbo mode to %m.onOff",          " ", 106, "setTurboMode","on"],

    public function refreshScreen():void{stagePart.refresh();}