#main_nav_list a.main_nav_active_item {
				   background: url(img1.png) no-repeat;

				}
			#main_nav_list a.main_nav_item_2 {
				   background: url(img2.png) no-repeat;

				}
				#main_nav_list a.main_nav_item_2:hover {
				   background: url(img3.png) no-repeat;

				}