java - Moving to different servlet other than form action -

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i having form :

<form action="sendaddnotification" method="post">         <%string namee=rs.getstring(2);%> <input name="indusername"  type="hidden" value="<%=namee%>"/> user name : <%=namee%> <br> first name : <%=rs.getstring(4)%>      <br>  last name : <%=rs.getstring(5)%>     <br>  email id : <%=rs.getstring(6)%>     <br>  contact : <%=rs.getstring(7)%>    <br>    <%    string groupidd = request.getsession().getattribute("groupid").tostring();    s=null;    rs=null;    int flag=0;    string sql="select * tbgroupusers i_id=? , gu_groupid=?";      s = con.preparestatement(sql);     s.setstring(1,idperson);     s.setstring(2,groupidd);     rs=s.executequery();     if(rs.next())     flag=1;     request.setattribute("flag", flag);    %>  <c:choose> <c:when test="${requestscope.flag == 1}">     <!-- flag 1 -->     <input type="submit" value="request sent" disabled="disabled"></input>     <a href="cancelrequest?userid=<%=idperson%>&userrnamee=<%=namee%>" onclick="return confirm('are sure want cancel request?');">     <input type="submit" value="cancel request"></input>     </a>  </c:when> <c:otherwise>     <!-- flag isn't 1 -->     <input type="submit" value="add"></input> </c:otherwise>  </c:choose>   <a href="searchdatabasetoadd.jsp"><input type="button" value="back"></input></a>  </form>

now ,in part of code : 

<a href="cancelrequest?userid=<%=idperson%>&userrnamee=<%=namee%>" onclick="return confirm('are sure want cancel request?');">     <input type="submit" value="cancel request"></input>     </a>

i want move servlet cancelrequest.java given parameters.but form action goes sendaddnotification,so servlet never runs.

how make run on click of button.please help

assuming cancelrequest servlet defined in web.xml as:

    <servlet>          <servlet-name>cancelrequest</servlet-name>          <servlet-path>packagename.cancelrequest</servlet-path>     </servlet>     <servlet-mapping>          <servlet-name>cancelrequest</servlet-name>          <url-pattern>/cancelrequest</url-pattern>     </servlet-mapping>

write javascript function as:

    function cancelrequest(){         var exit = confirm('are sure want cancel request?');         if(exit == true){             document.getelementbyid('sendaddnotificationid').action = 'cancelrequest';         }else{             return;         }     }

include id form in jsp as:

    <form action="sendaddnotification" id="sendaddnotificationid" method="post">

and change anchor element as:

    <a href="cancelrequest?userid=<%=idperson%>&userrnamee=<%=namee%>" onclick="cancelrequest();">         <input type="submit" value="cancel request"></input>     </a>

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