#main_nav_list a#main_nav_item1 {
				   background: url(img20.png) no-repeat;

				}
				#main_nav_list a#main_nav_item1:hover {
				   background: url(img21.png) no-repeat;

				}
			#main_nav_list a.main_nav_active_item {
				   background: url(img22.png) no-repeat;

				}
			#main_nav_list a#main_nav_item3 {
				   background: url(img3.png) no-repeat;

				}
				#main_nav_list a#main_nav_item3:hover {
				   background: url(img4.png) no-repeat;

				}