I have a web page using javascript to enable/disabled an image button
and switch its image when values are entered into a couple of
textboxes.  I have all that working fine, but my code considers a
space a value.  Anyone have any idea how to keep my button disabled if
spaces are entered into the textboxes?  Below is my code:

   <script type="text/javascript">

       function SetImage()
         {
           var
txtAnswer1=document.getElementById("txtAnswer1").value;
           var
txtAnswer2=document.getElementById("txtAnswer2").value;

           if (txtAnswer1.length > 0 && txtAnswer2.length > 0)
                   {
                       var y=document.getElementById("btnSubmit");
                       y.src = "../Images/submit_active.gif";

window.document.getElementById("btnSubmit").disabled = false;
                   }

           if (txtAnswer1.length == 0 || txtAnswer2.length == 0)
                   {
                       var y=document.getElementById("btnSubmit");
                       y.src = "../Images/submit_inactive.gif";

window.document.getElementById("btnSubmit").disabled = true;
                   }
         }

   </script>

<asp:TextBox ID="txtAnswer1" runat="server" MaxLength="255"
onKeyUp="SetImage()"></asp:TextBox>
<asp:TextBox ID="txtAnswer2" runat="server" MaxLength="255"
onKeyUp="SetImage()"></asp:TextBox>

Thanks