横向menu控件菜单的下拉菜单被frame档住
请如何设置才能不被挡住
------解决方案--------------------------------------------------------
创建一个页面比如A.aspx，在该页面的上半部分放menu，在下半部分嵌入一个iframe框架，在此框架中放菜单所要导航的目的页面：
<%@ Page Language= "C# " EnableViewState= "false " AutoEventWireup= "true " CodeFile= "Top.aspx.cs " Inherits= "Admin_Top " %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN " "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<html xmlns= "http://www.w3.org/1999/xhtml " >
<head runat= "server ">
<title> </title>
</head>
<body>
<form id= "form1 " runat= "server ">
<div id= "topheadermenu ">
<asp:SiteMapDataSource ID= "SiteMapDataSource1 " SiteMapProvider= "AdminSiteMap " runat= "server " ShowStartingNode= "false "/>
<asp:Menu ID= "Menu1 " Target= "mainFrame " runat= "server " Orientation= "Horizontal " >
</asp:Menu>
</div>
<iframe name= "mainFrame " width= "100% " src= "MyInfo/MyInfoView.aspx " height= "2200px " scrolling= "no " frameborder= "0 ">
</iframe>
</form>
</body>
</html>