function init_openable() {
	var openable = $(".openable");
	
	for (var i = 0; i < openable.length; i++) {
		
		var item     = $(openable[i]);
		var opener   = $(".opener", item);
		var contener = $(".contener", item);
		
		opener.click(function() {
			var contener = $(".contener", $(this).parent())
			contener.toggle("blind");
		});
		contener.hide();
	}
}
$(document).ready(init_openable);
/* end content opening */