Validation Not Working
<asp:UpdatePanel runat="server" ID="UpdPnl_AddLocation">
<ContentTemplate>
<div class="form">
<div class="line">
<div class="user-input">
<asp:DropDownList ID="UILoc_AccountID" runat="server" DataSourceID="SqlAccountID_Loc" DataTextField="AccountName" DataValueField="AccountID" TabIndex="2" AppendDataBoundItems="True" CssClass="reqfld">
<asp:ListItem Text="-- Select Customer --" Value="-1" />
</asp:DropDownList>
</div>
<asp:RequiredFieldValidator ID="RFCreateLoc_AccountID" runat="server" ControlToValidate="UILoc_AccountID" Text="<img src='../../../content/img/validate/required-selection.png'>"
Validatio ...
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