I have a link list that I create with repeater from a database table.
The menu is like
English
FInnish
Swedish

In the database english have id 1 and finnish id 2 and sve id 3
Now I would want to put the id number into a cookie. I Have tried with this
<a href='<%#Response.Cookies("LangID").value =%>' & '<%#language.FieldValue("LangID", Container) %>'>
 <%# language.FieldValue("Languages", Container) %></a>

How should I write that I wouldn't get error?
And than to last I want to redirect to another page

You should be using a postback control (button or linkbutton) that then creates the cookie object that you pass to Response.Cookies.Add(). Then do a Response.Redirect().

-Peter