关于导航菜单的问题！

<STYLE type=text/css>#menubar {

 BACKGROUND: rgb(212,208,200); FONT: menu; CURSOR: default; POSITION: relative
}
#menubar .root {

 BORDER-RIGHT: rgb(212,208,200) 1px solid; PADDING-RIGHT: 2pt; BORDER-TOP: rgb(212,208,200) 1px solid; PADDING-LEFT: 2pt; BORDER-LEFT: rgb(212,208,200) 1px solid; BORDER-BOTTOM: rgb(212,208,200) 1px solid
}
#menubar TABLE {

 BORDER-RIGHT: gray 2px solid; PADDING-RIGHT: 0pt; BORDER-TOP: #eeeeee 2px solid; DISPLAY: none; PADDING-LEFT: 0pt; BACKGROUND: rgb(212,208,200); PADDING-BOTTOM: 0pt; MARGIN: 0pt; FONT: menu; BORDER-LEFT: #eeeeee 2px solid; PADDING-TOP: 0pt; BORDER-BOTTOM: gray 2px solid; POSITION: absolute
}
#menubar TABLE TD {

 PADDING-RIGHT: 15pt; PADDING-LEFT: 12pt; PADDING-BOTTOM: 2pt; MARGIN: 0pt; PADDING-TOP: 2pt
}
#menubar .highlight {

 BACKGROUND: #08246b; COLOR: white
}
#menubar .disabledhighlight {

 BACKGROUND: rgb(212,208,200); COLOR: gray
}
#menubar #break {

 COLOR: gray
}
#menubar .disabled {

 COLOR: gray
}
#menubar #break {

 PADDING-RIGHT: 0pt; PADDING-LEFT: 0pt; PADDING-BOTTOM: 0pt; MARGIN: 0pt; PADDING-TOP: 0pt
}
#menubar SPAN.more {

 PADDING-RIGHT: 0pt; PADDING-LEFT: 0pt; LEFT: 14pt; FLOAT: right; PADDING-BOTTOM: 0pt; MARGIN: 0pt; FONT: 9pt webdings; WIDTH: 0.8em; PADDING-TOP: 0pt; POSITION: relative; TOP: -2pt; HEIGHT: 9pt
}
#menubar .TBHandle {

 BORDER-RIGHT: buttonshadow 1px solid; BORDER-TOP: buttonhighlight 1px solid; FONT-SIZE: 10pt; BORDER-LEFT: buttonhighlight 1px solid; WIDTH: 3px; POSITION: absolute; TOP: 1px; HEIGHT: 22px; BACKGROUND-COLOR: menu
}
#menubar .yToolbar {

 BORDER-RIGHT: buttonshadow 1px solid; BORDER-TOP: buttonhighlight 1px solid; LEFT: 0px; BORDER-LEFT: buttonhighlight 1px solid; BORDER-BOTTOM: buttonshadow 1px solid; POSITION: relative; TOP: 0px; HEIGHT: 27px; BACKGROUND-COLOR: menu
}
.handbtn {

 BORDER-RIGHT: buttonshadow 1px solid; BORDER-TOP: buttonhighlight 1px solid; BACKGROUND: buttonface; BORDER-LEFT: buttonhighlight 1px solid; WIDTH: 3px; BORDER-BOTTOM: buttonshadow 1px solid; HEIGHT: 21px
}
.sepbtn1 {

 BORDER-RIGHT: buttonhighlight 1px solid; BORDER-LEFT: buttonshadow 1px ridge; WIDTH: 2px
}
</STYLE>