css button

Hey guys I am having a problem with a css button. I have used a css button that i got off the net and I am calling a public sub on the onclick function here is the code

HTML Code:

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<div style="padding-left:22px;">
                        <a class="button" href="#" onclick="<%# check() %>">
                                <span><span><span><span>Confirm Order's</span></span></span></span>
                        </a>
                    </div>

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Here is the <% check() %> code

Code:

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Public Sub check()
        Dim cn As New SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\StonemansGardenCentre.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True")

        Dim SSQL As String
        SSQL = "Select * From user_tbl Where UserName = '" & textbox1.Value & "' and Password = '" & textbox2.Value & "'"

        Dim command As New SqlCommand(SSQL, cn)

        Dim table As New DataTable
        Dim adapter As New SqlDataAdapter

        adapter.SelectCommand = command
        adapter.Fill(table)

        If table.Rows.Count > 0 Then
            textbox1.Value = ""
            textbox2.Value = ""
            Session("UserName") = table.Rows(0)("UserName")
            Session("LoggedIn") = "1"
            Session("Priviliges") = table.Rows(0)("Priviliges")
            Response.Redirect("Home.aspx")
        Else
            wrong.Visible = True
            textbox1.Value = ""
            textbox2.Value = ""
        End If

    End Sub

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Now here is the error I am getting. Can anyone help?

Overload resolution failed because no accessible 'ToString' can be called with these arguments:
it has highlighted the

<a class="button" href="#" onclick="<%# check() %>">

part.

Thanks for any help in advance

Change the declaration to:

Code:

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<a class="button" href="#" onclick="check" runat="server">

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And modify your method signature to:

Code:

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Public Sub check(sender As Object, e As EventArgs)

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Out of interest, the code is subject to SQL injection attacks . May want to look at session hijacking as well :)