or
<telerik:RadComboBox ID="cbProject" runat="server" AutoPostBack="True" OnSelectedIndexChanged="cbProject_SelectedIndexChanged" Height="120px" Sort="Ascending" EmptyMessage="Enter Project" MarkFirstMatch="true" ValidationGroup="ClassValidationGroup"> </telerik:RadComboBox> <asp:RequiredFieldValidator ID="reqCategory" ControlToValidate="cbProject" runat="server" ErrorMessage="Please Select A Project" ValidationGroup="ClassValidationGroup" InitialValue="" Display="Dynamic"> </asp:RequiredFieldValidator> <telerik:RadTabStrip ID="rpdTabStrip" Skin="Web20" runat="server" ClickSelectedTab="True" AutoPostBack="True" SelectedIndex="0" CausesValidation="true">setPostalAddressInRed() {
var isChecked = document.getElementById('AddressInactiveCheckBox').checked;
var postState = document.getElementById('StatesComboBox');
if(isChecked == true) {
postState.style.color = 'red';}
else {
postState.style.color = 'black';
}
}