dojo.require("dijit.dijit");
	dojo.require("dojo.data.ItemFileReadStore");
	dojo.require("dijit.layout.BorderContainer");
	dojo.require("dijit.layout.StackContainer");
	dojo.require("dijit.layout.TabContainer");
	dojo.require("dijit.layout.ContentPane");
	dojo.require("dijit.form.Button");
	dojo.require("dojox.image.Gallery");
	dojo.require("dojo.parser");


	function selected(page, stack){
		var widget=dijit.byId(stack);
		dijit.byId("previous-" + stack).attr("disabled", page.isFirstChild);
		dijit.byId("next-" + stack).attr("disabled", page.isLastChild);
	}
	function selectedStackUebergebuehr(page) { selected(page, "stack-uebergebuehr"); }
	dojo.subscribe("stack-uebergebuehr-selectChild", selectedStackUebergebuehr);
	function selectedStackAktivitaeten(page) { selected(page, "stack-aktivitaeten"); }
	dojo.subscribe("stack-aktivitaeten-selectChild", selectedStackAktivitaeten);
	function selectedStackMitmachen(page) { selected(page, "stack-mitmachen"); }
	dojo.subscribe("stack-mitmachen-selectChild", selectedStackMitmachen);
	function selectedStackVerein(page) { selected(page, "stack-verein"); }
	dojo.subscribe("stack-verein-selectChild", selectedStackVerein);