/Controls/Samples/TClientSideValidator/Home.page
<com:TContent ID="body">
<h1>Conditional Validation (client-side + server side)</h1>
<com:TStyleSheet>
.required {
background-color: #E77471;
}
</com:TStyleSheet>
<table class="sampletable">
<tr>
<td class="samplenote">
Validator with default settings:<br />
Check "optional" to validate both textboxes
</td>
<td class="sampleaction">
<com:TTextBox ID="text1" />
<com:TRequiredFieldValidator
ID="validator1"
ControlToValidate="text1"
ErrorMessage="*"
ControlCssClass="required"/>
<com:TTextBox ID="text2" />
<com:TRequiredFieldValidator
ID="validator2"
ControlToValidate="text2"
OnValidate="check_validate"
ErrorMessage="*"
ControlCssClass="required">
<prop:ClientSide.OnValidate>
sender.enabled = jQuery('#<%= $this->check1->ClientID %>').get(0).checked;
</prop:ClientSide.OnValidate>
</com:TRequiredFieldValidator>
<com:TCheckBox ID="check1" Text="Optional" />
<com:TButton ID="submit1" Text="Submit" />
</td>
</tr>
</table>
</com:TContent>