function onCompletionCollect(view, selection, set) {
	// if we are not inside of comments or documentation (Style.Text == 1 ), add our items to the list
	if ( view.Document.GetStyleFromPos(selection.Start, true).Style.Text != 1 ) {
		// add item as string, ше would be displayed using default style
		set.Add("Variable1");
		// or explicitely as completion item, if you want to better item customizing options
		// for example, assigning of special style, as below
		set.Add(CompletionItem("Variable1", "variable"));	
	}
	return true;
}

// create and register completion provider to be used for JavaScript (id="js") and all syntaxes inherited from it
Application.RegisterCompletionProvider("js", Application.CompletionProvider(onCompletionCollect));