ul.collapse_menu li {
	position: relative;
}

ul.collapse_menu li .arrow-expand {
  background: url('menu-expand.png') top center no-repeat;
	cursor: pointer;
	height: 15px;
	position: absolute;
	right: 10px;
	text-align: center;
	top: 7px;
	width: 15px;
}

ul.collapse_menu li .arrow-collapse {
  background: url('menu-collapse.png') top center no-repeat;
	cursor: pointer;
	height: 15px;
	position: absolute;
	right: 10px;
	text-align: center;
	top: 7px;
	width: 15px;
}

ul.collapse_menu li div.sub_menu {
	display:none;
}