Here is my code


 <tr>
      <td align="right" valign="top" ><B>Date: </B></TD>
      <TD valign="top"><Input class="text3" input type="text" maxLength="12" id="txteffdt" name="date1" size="9" value="<%= FormatDateTime(now(),2)%>">
      <A href="javascript:ShowCalendar(document.myForm.dateimg1,document.myForm.date1,null, '<%= FormatDateTime(DateAdd("yyyy", -1, now()),2)%>', '<%= FormatDateTime(DateAdd("yyyy", 1, now()),2)%>')" onclick=event.cancelBubble=true;>
      <IMG align=top border=0 height=21 id=dateimg1 src="cal/calendar.gif" style="POSITION: relative" width=34></A></td>
  </tr>

oCom17.Parameters.Add("@txteffdt", system.Data.SqlDbType.datetime, 12).value = txteffdt.value

I get this error message:
BC30456: 'value' is not a member of 'System.Web.UI.WebControls.TextBox'.

This error msg is with text or value

You can't access properties of html controls without adding the runat="server" attribute to them.  Either add that to the input tag or use an asp:textbox control instead.

When I add the runat="server" to the input tag the date popup calander locks up.

The input value on the form will show <%=FormatDateTime(now(),2)%> instead of the value 06/21/2005 that I receive without runat="server"
 

use
Request.Form("TextBoxID")  --> in VB.NET
or
Request.Params("TextBoxID")  --> in C#

in codebehind to get the value of the input textbox. 
"TextBoxID" is the id generated for textbox in HTML (View source in the broswer)

try replacing the inline code  <%=FormatDateTime(now(),2)%> with adding runat=server to the textbox and initializing the the  textbox value in the page_load event  txteffdt.text =FormatDateTime(now(),2)