#main_nav_list a.main_nav_item_1 {
				   background: url(img4.png) no-repeat;

				}
				#main_nav_list a.main_nav_item_1:hover {
				   background: url(img1.png) no-repeat;

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

				}