谢谢各位

我原来在那里下载的有个例子，我找找看，可以不被框架和select挡住的，我把代码给你瞧瞧：
// Milonic DHTML Menu
// please note that major changes to this file have been made.
//
// You no longer need to number your menus as in previous versions. 
// The new menu structure allows you to name the menu instead. This means that you to remove menus and not break the system.
// The structure should also be much easier to modify, add & remove menus and menu items.
// 
// If you are having difficulty with the menu please read the FAQ at http://www.milonic.co.uk/menu/faq.php before contacting us.
//
// Please note that the above text CAN be erased if you wish.// The following line is critical for menu operation, and must appear only once.
menunum=0;menus=new Array();_d=document;function addmenu(){menunum++;menus[menunum]=menu;}function dumpmenus(){mt="<script language=javascript>";for(a=1;a<menus.length;a++){mt+=" menu"+a+"=menus["+a+"];"}mt+="<\/script>";_d.write(mt)}
//Please leave the above line intact////////////////////////////////////
// Editable properties START here //
////////////////////////////////////
effect = "Fade(duration=0.2);Alpha(style=0,opacity=80);Shadow(color='#777777', Direction=135, Strength=5)" // Special effect string for IE5.5 or above please visit http://www.milonic.co.uk/menu/filters_sample.php for more filterstimegap=500 // The time delay for menus to remain visible
followspeed=5 // Follow Scrolling speed
followrate=40 // Follow Scrolling Rate
suboffset_top=10; // Sub menu offset Top position 
suboffset_left=10; // Sub menu offset Left position
plain_style=[ // Menu Properties Array
"navy", // Off Font Color
"ccccff", // Off Back Color
"FFEBCD", // On Font Color
"4B0082", // On Back Color
"000000", // Border Color
12, // Font Size
"normal", // Font Style
"bold", // Font Weight
"Verdana, Tahoma, Arial, Helvetica", // Font
4, // Padding
"images/arrow.gif" // Sub Menu Image
, // 3D Border & Separator
,"66ccff" // 3D High Color
,"000099" // 3D Low Color
]
addmenu(menu=[ // This is the array that contains your menu properties and details
"simplemenu1", // Menu items Name
300, // Top
200, // left
, // Width
1, // Border Width
, // Screen Position - here you can use "center;left;right;middle;top;bottom"
plain_style, // Properties Array - this is set higher up, as above
1, // Always Visible - allows the menu item to be visible at all time
"left", // Alignment - sets the menu elements alignment, HTML values are valid here for example: left, right or center
, // Filter - Text variable for setting transitional effects on menu activation
, // Follow Scrolling - Tells the menu item to follow the user down the screen
1,  // Horizontal Menu - Tells the menu to be horizontal instead of top to bottom style
, // Keep Alive - Keeps the menu visible until the user moves over another menu or clicks elsewhere on the page
, // Position of sub image left:center:right:middle:top:bottom
, // Show an image on top menu bars indicating a sub menu exists below
, // Reserved for future use
, // Reserved for future use
, // Reserved for future use
,
,
,
,"Home","/menu",,,1 // "Description Text", "URL", "Alternate URL", "Status", "Separator Bar"
,"Links","show-menu=links",,"",1
,"News&nbsp;sites","show-menu=news",,"",1
,"Webmaster","show-menu=webmaster",,"",1
,"Downloads","show-menu=plain_downloads",,"",1
,"Search","show-menu=plain_search",,"",1
])addmenu(menu=["links",
,,160,1,"",plain_style,,,effect,,,,,,,,"form1",,,,
,"DHTML Menu", "/menu  target=new",,,0
,"Dynamic Drive", "http://www.dynamicdrive.com target=new",,,0
,"Content Management", "http://www.refsite.co.uk target=new",,,0
,"Business Meetings", "http://www.businessmeetings.com target=new",,,0
])addmenu(menu=["news",
,,170,1,"",plain_style,,"left",effect,,,,,,,,"form1",,,,
,"CNN","http://www.cnn.com",,,0
,"MSNBC","http://www.msnbc.com",,,0
,"ABC News","http://www.abcnews.com",,,0
,"Vancouver Local News","show-menu=vancouvernews",,,0
,"BBC News","http://news.bbc.co.uk",,,0
])addmenu(menu=["vancouvernews",
,,120,1,"",plain_style,,"left",effect,,,,,,,,,,,,
,"CTV News","http://www.ctvnews.com",,,1
,"Vancouver Sun","http://www.canada.com/vancouver/vancouversun/",,,1
])addmenu(menu=["webmaster",
,,170,1,"",plain_style,,"center",effect,,,,,,,,"form1",,,,
,"Dynamic Drive","http://www.dynamicdrive.com",,,
,"Website Abstraction","http://www.wsabstract.com",,,
,"Freewarejava.Com","http://www.freewarejava.com",,,
,"Flaming Text","http://www.flamingtext.com",,,
,"Active-X.com","http://www.active-x.com",,,
,"Web Monkey","http://www.webmonkey.com",,,
,"Jars","http://www.jars.com",,,
])addmenu(menu=["plain_downloads",,,120,1,,plain_style,0,"left",effect,0,,,,,,,"form1",,,,
,"Download.com","http://www.download.com",,,1
,"Tucows","http://www.tucows.com",,,1
])addmenu(menu=["plain_search",
,,140,1,"",plain_style,,"",effect,,,,,,,,,,,,
,"Google.com", "http://www.google.com",,,1
,"Yahoo", "http://www.yahoo.com",,,1
,"Altavista", "http://altavista.com",,,1
,"Excite", "http://www.excite.com",,,1
])
dumpmenus()