Telerik Rad Window Alert

ASP.NET
<%@ Register TagPrefix="rad" Namespace="Telerik.WebControls" Assembly="RadWindow.Net2" %>

<rad:RadWindowManager ID="RadWindowManager1" runat="server" Left="" NavigateUrl="" Skin="Office2007" SkinsPath="~/RadControls/Window/Skins" Title="" Top="">
</rad:RadWindowManager>


C#

protected void btnSave_Click(object sender, EventArgs e)
{
string strWindowTitle = "Saved";
string strAlert = "Settings have been Saved.";
string strWidth = "330";
string strHeight = "200";

string alert = "<script language='javascript'>" + "radalert('" + strAlert + "', " + strWidth + ", " + strHeight + ", '" + strWindowTitle + "');" + "</script>";

Page.RegisterStartupScript("AlertScript", alert);
}