var DEFAULT_PATH = "";

windowDomReady[windowDomReady.length] = function() {
	DEFAULT_PATH = $("messagesImage").getProperty("src");
};

function messages_on(img) {
	var current_path = $("messagesImage").getProperty("src").split("/");
	var new_path = "";
	
	for (var i = 0; i < (current_path.length) - 1; i++) {
		if (current_path[i].length > 0)
			new_path += "/" + current_path[i];
	}
		
	new_path += "/" + "messages_" + img + "_on.gif";
	
	$("messagesImage").setProperty("src", new_path);
}

function messages_off() {
	$("messagesImage").setProperty("src", DEFAULT_PATH);
}