asp.net母版页，用户控件，导致的控件ID不固定的解决方法

Page_Load中：

            StringBuilder strScript = new StringBuilder();
            strScript.Append("var objRadialTire = '#" + RadialTireValue.ClientID + "';");
            strScript.Append("var objVacuumTire = '" + VacuumTireValue.ClientID + "';");
            ClientScript.RegisterStartupScript(this.GetType(), "", strScript.ToString(), true);

js部分：

$(objRadialTire).val(“some value”);