$(document).ready(function() {
	$("#MAIN_MENU").find("li").hover(function() {
		$(this).find("a").css("background", "url(http://www.narl.org.tw/experimental/smarty/tw/visitor/templates/image/mouse_over.gif)");
	}, function(){
		$(this).find("a").css("background", "url(http://www.narl.org.tw/experimental/smarty/tw/visitor/templates/image/mouse_still.gif)");
		});	
	
	$("#MENU_1").hover(function() {
		$("#ITEM_1").css("font-weight", "bold");
		$("#ITEM_1").find("a").css("background", "url(http://www.narl.org.tw/experimental/smarty/tw/visitor/templates/image/mouse_over.gif)");
	}, function(){
		$("#ITEM_1").css("font-weight", "normal");
		$("#ITEM_1").find("a").css("background", "url(http://www.narl.org.tw/experimental/smarty/tw/visitor/templates/image/mouse_still.gif)");
		});
	$("#MENU_2").hover(function() {
		$("#ITEM_2").css("font-weight", "bold");
		$("#ITEM_2").find("a").css("background", "url(http://www.narl.org.tw/experimental/smarty/tw/visitor/templates/image/mouse_over.gif)");
	}, function(){
		$("#ITEM_2").css("font-weight", "normal");
		$("#ITEM_2").find("a").css("background", "url(http://www.narl.org.tw/experimental/smarty/tw/visitor/templates/image/mouse_still.gif)");
		});		
		
});