jquery实现简单的二级导航下拉菜单效果

<title>jquery二级导航菜单</title>
<style>
.ddsmoothmenu {
 MARGIN: 0px auto; FONT: 12px Verdana; WIDTH: 730px
}
.ddsmoothmenu UL {
 PADDING-RIGHT: 0px; PADDING-LEFT: 0px;BACKGROUND: #2b9801; Z-INDEX: 100; FLOAT: left; PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-TOP: 0px; LIST-STYLE-TYPE: none
}
.ddsmoothmenu UL LI {
 DISPLAY: block; FLOAT: left; WIDTH: 81px; LINE-HEIGHT: 31px; POSITION: relative; TEXT-ALIGN: center
}
 HTML .ddsmoothmenu UL LI {
 FLOAT: left; WIDTH: 81px; LINE-HEIGHT: 31px; POSITION: relative; TEXT-ALIGN: center
}
.ddsmoothmenu UL LI A {
 DISPLAY: block; FONT-WEIGHT: bold; WIDTH: 81px; TEXT-DECORATION: none
}
.ddsmoothmenu UL LI A:link {
 COLOR: #fff
}
.ddsmoothmenu UL LI A:visited {
 COLOR: #fff
}
.ddsmoothmenu UL LI A:hover {
 COLOR: #ffff00
}
.ddsmoothmenu UL LI UL {
 LEFT: 0px; VISIBILITY: hidden; POSITION: absolute
}
.ddsmoothmenu UL LI UL LI {
 BACKGROUND: #2b9801; FLOAT: left; WIDTH: 81px; LINE-HEIGHT: 25px; BORDER-BOTTOM: #96d47d 1px solid
}
.ddsmoothmenu UL LI UL LI A {
 DISPLAY: block; WIDTH: 81px; TEXT-DECORATION: none
}
.ddsmoothmenu UL LI UL LI A:hover {
 BACKGROUND: #51b228
}
.ddsmoothmenu UL LI UL LI UL {
 TOP: 0px
}
.downarrowclass {
 DISPLAY: none; POSITION: absolute
}
.rightarrowclass {
 DISPLAY: none; POSITION: absolute
}
.ddshadow {
 BACKGROUND: silver; LEFT: 0px; WIDTH: 0px; POSITION: absolute; TOP: 0px; HEIGHT: 0px
}
.toplevelshadow {
 opacity: 0.8
}
</style>
<SCRIPT src="/UploadFiles/2021-04-02/jquery1.3.2.js">

希望本文所述对大家的jquery程序设计有所帮助。