$(document).ready( function(){

	var current = '';

	$("img[id^='mmb']").mouseover( function(){
		var idx = $(this).attr("id");
			idx = idx.substring(3, idx.length);
		current = $(this).attr("src");
		$(this).attr("src", "http://img.office.net/club/menu/" + idx + "l.jpg");
	}).mouseout( function(){
		var idx = $("#menuimg li a img").index(this) + 1;
		$(this).attr("src", current);
	});



});