Change Background of Textbox using Jquery

change background of Textbox is very easy.
It is better to use CSS

 <style type="text/css">
         .aClass
        {
            background-color: #EBEBEB;
        }
    </style>

<script type="text/javascript">
        $(document).ready(function () {

                $("#TERMINALID").addClass("aClass");
        });
    </script>