Inserting Data Into A SQL Db Using VB && Javascript

Greetings to all -

I am trying to enter the date fields from my form into a SQL 2005 db by way of Visual Basic. The VB parameters are as follows:

Protected Sub DataEntry_Btn_NewGig_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles DataEntry_Btn_NewData.Click
        Dim EnterData As New SqlDataSource()
        EnterData.ConnectionString = ConfigurationManager.ConnectionStrings("MyDB_ConnectionString").ToString
        EnterData.InsertCommandType = SqlDataSourceCommandType.Text
        EnterData.InsertCommand = "INSERT INTO Data(Name,ExpertiseID,Description,PONumber,StartDate,EstHours,HourlyRate)VALUES(@Name,@ExpertiseID,@Description,@PONumber,@StartDate,@EstHours,@HourlyRate)"
        EnterData.InsertParameters.Add("Name", TBox_Name.Text)
        EnterData.InsertParameters.Add("ExpertiseID", Drop_Expertise.SelectedValue)
        EnterData.InsertParameters.Add("Description", TBox_Description.Text)

...and so on...

All works well with data input into the ASP form using VB. The problem is, I'm using a Javascript date picker (calendar) to make it easier for users to input the date into the "StartDate" SQL column mentioned above. Do I want to use Javascript to enter this data, or VB?  And, how do I write this code whether it is one or the other?  I want to have all data entered with one button click event.  Also, the code I am using for the calendar date picker is below:

<td><input type="text" name="date" id="f_date_a" readonly="readonly" />

<img src="img.gif" id="f_trigger_a" style="cursor: pointer; border: 1px solid blue;" title="Date selector" onmouseover="this.style.background='blue';"

onmouseout="this.style.background=''" alt="Click to Enter Date"/>

 

<script type="text/javascript">Calendar.setup({inputField : "f_date_a",ifFormat : "%B %e, %Y",button : "f_trigger_a",align : "TL",singleClick : true });

</script></td>

I apologize if this post is in the wrong forum; thanks to all in advance...