function allies_dropdown(dropdown_identifier) {
	with ($j("ul."+dropdown_identifier)) {
		if (css("display") == "none") {
			fadeIn("fast");
			with ($j("img."+dropdown_identifier)) {
				attr({
					"src": attr("src").replace(/down/, "up")
				});
			}
		} else {
			fadeOut("fast");
			with ($j("img."+dropdown_identifier)) {
				attr({
					"src": attr("src").replace(/up/, "down")
				});
			}
		}
	}
}