Validation summary AutoUpdate - asp.net

Question

In my asp.net application, I've tried to use validation summary in my web page.I've controls like
<td>First Name *</td>
<td>
<asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox>
<div>
<asp:RequiredFieldValidator ID="reqValStaffFirstName" runat="server"
ErrorMessage="Enter FirstName" Text="*"
ControlToValidate="txtFirstName" Display="Dynamic"
ValidationGroup="valGrpStaffGeneral">
</asp:RequiredFieldValidator>
</div>
</td>
<td>Last Name *</td>
<td>
<asp:TextBox ID="txtLastName" runat="server"></asp:TextBox>
<div>
<asp:RequiredFieldValidator ID="reqValStaffLastName" runat="server"
ErrorMessage="Enter LastName" Text="*"
ControlToValidate="txtLastName" Display="Dynamic"
ValidationGroup="valGrpStaffGeneral">
</asp:RequiredFieldValidator>
</div>
</td>
<td>
<asp:Button Id="btnSave" runat="server" ValidationGroup="valGrpStaffGeneral">
<td>
and my validationsummary script is
<asp:ValidationSummary ID="summary1" ShowSummary="true" runat="server"
ValidationGroup="valGrpStaffGeneral" DisplayMode="BulletList" />
If I click on save button without filling anything in textbox1 and textbox2 its showing validation errors in my validation summary area. If I fill anything in my textboxes and press tab the error(*) disappears automatically, but the error in the validation summary not changing automatically and its displaying until I click on save button, what should I do to make the validation summary change the fixed errors automatically.

Answer 1

This might be of help - look at the EnableClientScript property of the ValidationSummary control.
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.validationsummary.enableclientscript.aspx