function to set default zero using JQuery

 SetZeroDefault: function (sender, decimal) {
        ////<summary>function to set default zero </summary>
        /// <param name="sender"  type="Object">
        /// Determines the Textbox
        /// </param>
        /// <param name="decimal"  type="integer">
        /// Determines the no. of decimal points
        /// </param>

        if ($(sender).val() == "") {
            if (!decimal)
                $(sender).val("0");
            else {
                switch (decimal) {
                    case 0:
                        $(sender).val("0");
                        break;
                    case 1:
                        $(sender).val("0.0");
                        break;
                    case 2:
                        $(sender).val("0.00");
                        break;
                    case 3:
                        $(sender).val("0.000");
                        break;
                }
            }
        }
    }