将JSP与按钮一起使用

做这样的事情：

    <%         if(request.getParameter("buttonName") != null) {    session.setAttribute("status", "guest");        }    %>    <FORM NAME="form1" METHOD="POST">        <INPUT TYPE="HIDDEN" NAME="buttonName">        <INPUT TYPE="BUTTON" VALUE="Button 1" onCLICK="button1()">    </FORM>    <script LANGUAGE="Javascript">        <!--        function button1()        { document.form1.buttonName.value = "yes"; form1.submit();        }         // -->     </script>