auto refresh using jQuery

auto refresh using jQuery

Please help me......
I called my User Control (.ascx) file from .aspx file. User Control carries info of production status. The user control is inside:
[code]
<div id="mydiv">
<control:uc ID="myid" runat="server" />
</div>
[code]
I want to be able to refresh (or reload) the User Control automatically every 30 minutes
is there any way for me to call div by "#myid" and refresh the User Control to display new status?

Appreciate any help in advance
[code][/code]