jquery设置鼠标经过点击样式

ul{list-style: none outside none;}ul li {    border-bottom: 1px dashed #AACCEE;    cursor: pointer;    line-height: 25px;    padding-left: 5px;}ul li.choose {    background: none repeat scroll 0 0 #FFF9ED;}ul li.over {    background: none repeat scroll 0 0 #EEF7FF;}