Dynamically setting a theme in ASP.NET Whidbey from a drop down list box

With some suggestions from ScottW and J. Ambrose Little, I just got done with some code to dynamically set a page's theme thru a drop down list box.  While this code works, I think the code that I finished with is pretty ugly, so if you have some suggestions, I am more than glad to hear them.  BTW, I tried to use the Control.ClientID to get the value from the Request.Form collection with little luck.  Even through the form on the master page is set to perform a GET, it still seems to be performing a POST.  Note that UglySkin is a theme that I created that is visually disgusting.

Wally

<script runat="server">

void ddlTheme_SelectedIndexChanged(object sender, EventArgs e)

Response.Redirect(Request.ServerVariables["Script_Name"].ToString() + "?ThemeValue=" + Convert.ToString(ddlTheme.SelectedItem.Text));

void Page_PreInit(Object sender, System.EventArgs e)

if (Request.QueryString["ThemeValue"] != null )

string strValue = Request.QueryString["ThemeValue"].ToString();

Page.Theme = strValue;

void Page_Load(object sender, EventArgs e)

if ( ( Request.QueryString["ThemeValue"] != null) && ( !Page.IsPostBack ) )

string strValue = Request.QueryString["ThemeValue"].ToString();

foreach (ListItem liItem in ddlTheme.Items)

if (liItem.Value == strValue)

liItem.Selected = true;

break;

</script>

<asp:Content ID="cObj" ContentPlaceHolderID="cph1" Runat="server">

<asp:DropDownList

ID="ddlTheme" Runat="server" AutoPostBack="true" OnSelectedIndexChanged="ddlTheme_SelectedIndexChanged">

<asp:ListItem></asp:ListItem>

<asp:ListItem>BasicBlue</asp:ListItem>

<asp:ListItem>SmokeAndGlass</asp:ListItem>

<asp:ListItem>UglySkin</asp:ListItem>

</asp:DropDownList><br />

<asp:Label ID="lblText" Runat="Server">Theme Test.</asp:Label><br />

<asp:TextBox ID="txtText" Runat="server">Text Box Test</asp:TextBox><br />

</asp:Content>