ASP.NET:如何更改验证失败的控件的背景颜色？

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Submit" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1" ErrorMessage="This field is required"></asp:RequiredFieldValidator>

    function changeBackgroundColor() {
        var textBox = document.getElementById('<%= TextBox1.ClientID %>');
        textBox.style.backgroundColor = 'red';
    }
</script>

    #TextBox1 {
        background-color: white;
    }
</style>

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1" ErrorMessage="This field is required" OnError="changeBackgroundColor()"></asp:RequiredFieldValidator>