Validation for Phone number

<script language="javascript">
    <!--
        function initValidation()
        {
            var objForm = document.forms["contactus"];
            objForm.fname.required = 1;
            objForm.fname.regexp =/\w*$/;

            objForm.phone.required = 1;
            objForm.phone.regexp = /^\d+([\.]\d\d)?$/;

            objForm.email.required = 1;
            objForm.email.regexp = "JSVAL_RX_EMAIL";
        }
    //-->
    </script>

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http://www.shreejiinfotek.com/