js (';' JAVASCRIPT )*

ScriptEngine	engine		= new ScriptEngineManager().getEngineByName("javascript");
ScriptContext	context		= null;
Bindings		bindings	= null;
StringWriter	stdout		= new StringWriter();
StringWriter	stderr		= new StringWriter();

static String	_js			= "${js [;<js expr>...]}";

public Object _js(String args[]) throws Exception {
	verifyCommand(args, _js, null, 2, Integer.MAX_VALUE);

	StringBuilder sb = new StringBuilder();

	for (int i = 1; i < args.length; i++)
		sb.append(args[i]).append(';');

	if (context == null) {
		context = engine.getContext();
		bindings = context.getBindings(ScriptContext.ENGINE_SCOPE);
		bindings.put("domain", domain);
		String javascript = domain.mergeProperties("javascript", ";");
		if (javascript != null && javascript.length() > 0) {
			engine.eval(javascript, context);
		}
		context.setErrorWriter(stderr);
		context.setWriter(stdout);
	}
	Object eval = engine.eval(sb.toString(), context);
	StringBuffer buffer = stdout.getBuffer();
	if (buffer.length() > 0) {
		domain.error("Executing js: %s: %s", sb, buffer);
		buffer.setLength(0);
	}

	if (eval != null) {
		return toString(eval);
	}

	String out = stdout.toString();
	stdout.getBuffer().setLength(0);
	return out;
}