how to create multilevel database driven menu in asp.net c# or jquery

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C#

ASP.NET

C#4.0

jQuery

Hi Everyone,
I want to create multilevel menu for my website in which root note can have many child nodes and each child node can have more than 1 subchild i.e. it is N- level menu.
My datatable structure can have following two structure.

Create table menuTable
(
menuid int ,
parentid int,--parent of menuid
url varchar ,
menuname varchar
)

or

Create table menuTable
(
menuid int ,
parentid int,
childid int, --childid refers to child of menuid
url varchar ,
menuname varchar
)

i want to generate its html using ul li dynamically.for ex
>

<ul id="parentmenu">
<li>
//for root node
<ul class="mainmenu">
<li>
<a href="#">1</a>
  <ul>
<li>
<a href="#"> 1.1
</a> 
<ul class="finalchild">
<li><a href="~/site1.aspx"> 1.1.1 <a></li>
<li><a href="~/site1.aspx"> 1.1.2 <a></li>
</ul>
</li> 
   </ul>
</li>
</ul>
<li>
</ul>

please help me out.
Thanks in advance