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<%@ Page Language="C#" %>
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

    protected void mapMenu_Click(object sender, ImageMapEventArgs e)
    {
        switch (e.PostBackValue)
        {
            case "ToUpper":
                txtText.Text = txtText.Text.ToUpper();
                break;
            case "ToLower":
                txtText.Text = txtText.Text.ToLower();
                break;
            case "Erase":
                txtText.Text = String.Empty;
                break;
        }
    }



    ImageMap PostBack


    
    

            id="mapMenu"
        ImageUrl="MenuBar.gif"
        HotSpotMode="PostBack"
        Runat="server" OnClick="mapMenu_Click">
                    PostBackValue="ToUpper"
            Left="0"
            Top="0"
            Right="100"
            Bottom="30"
            AlternateText="To Uppercase" />
                    PostBackValue="ToLower"
            Left="100"
            Top="0"
            Right="200"
            Bottom="30"
            AlternateText="To Uppercase" />
                    PostBackValue="Erase"
            Left="200"
            Top="0"
            Right="300"
            Bottom="30"
            AlternateText="To Uppercase" />
    
    
            id="txtText"
        TextMode="MultiLine"
        Columns="40"
        Rows="5"
        Runat="server" />