javascript - How to show or hide a div on the basis of a java variable value -

i working in application getting variable values user end , on basis of values open , show div. taking values in scriplet , want show or hide div on basis of value. here posting , explaining code

<% user user = (user) request.getattribute(webkeys.user);               int useridint = (int) user.getuserid(); list<profile> existingprofile = profilelocalserviceutil.getbyuserid(useridint); string address1 = ""; string address2 = ""; int countrycode = 0; int statecode = 0; string city = ""; string zipcode = ""; string skypeid = ""; string twitter = ""; string primaryphone = ""; string secondaryphone = "";  for(int i=0;i<existingprofile.size();i++) {      address1 = existingprofile.get(i).getaddress1();     address2 = existingprofile.get(i).getaddress2();     countrycode = existingprofile.get(i).getcountryid();         statecode = existingprofile.get(i).getstate();     city = existingprofile.get(i).getcity();     zipcode = existingprofile.get(i).getzipcode();     skypeid = existingprofile.get(i).getskypeid();     twitter = existingprofile.get(i).gettwitter();     primaryphone = existingprofile.get(i).getprimaryphone();     secondaryphone = existingprofile.get(i).getsecondaryphone(); }     string getinsertedstatesql = "select stateid, name state countryid="+countrycode; statement st6 = con.createstatement(); resultset rs6 = st6.executequery(getinsertedstatesql);  string getselectedstatesql = "select stateid, name state countryid="+countryidonfailedvalidationint; statement st7 = con.createstatement(); resultset rs7 = st7.executequery(getselectedstatesql);  //system.out.println("user state code: "+statecode);   %>     <div id="personalinformationdiv"> 

personal information

<div id="primarylabel"> <table id="personalinformation">         <tr>                                 <th>address 1<span style='color: #ff0000; display: inline;'>*</span></th>                <td><label for="address1"><%=address1 %></label></td>             <td><a href="#" onclick="open_new();"><img style="border:0;" src="<%=request.getcontextpath()%>/images/edit.png" title="click edit"></a> </td>         </tr>          <tr>                             <th>address 2<span style='color: #ff0000; display: inline;'>*</span></th>                <td><label for="address2"><%=address2 %></label></td>         </tr>                    <tr>             <th>city<span style='color: #ff0000; display: inline;'>*</span></th>             <td><label for="city"><%=city %></label></td>         </tr>         <tr>             <th>primary phone<span style='color: #ff0000; display: inline;'>*</span></th>             <td><label for="primary phone" ><%=primaryphone %></label></td>         </tr>        </table> </div> <div style="display:none;"> <input type="checkbox" name="chk" id="chk"> </div>   <div id="contenttoshow">     <table id="personalinformationshowhide">     <tr>                     <th>address 1<span style='color: #ff0000; display: inline;'>*</span></th>                    <td>             <aui:input inlinefield="true" label="" name="address1" size="45" value="<%=address1 %>"/>                        </td>      </tr>     <tr>         <th>address 2</th>         <td><aui:input inlinefield="true" label="" name="address2" size="45" value="<%=address2 %>"/></td>     </tr>     <tr>         <th>country<span style='color: #ff0000; display: inline;'>*</span></th>         <td>         <select id="country" name="country">             <option value="none">- select country -</option>             <%                 while (rs5.next()) {                     int code = rs5.getint("code");                     string country = rs5.getstring("country");                                                   if( countrycode !=0 ){                         if(validationfailed!=null){                             if(validationfailed.equals("true")){                                 if( countryidonfailedvalidationint == code ){                                     %>                                     <option value="<%=countryidonfailedvalidationint%>" selected><%=country%></option>                                     <% }else{ %>                                     <option value="<%=code%>"><%=country%></option>                                     <%                                 }                             }                         }else{                             if( countrycode == code ){                                 %>                                 <option value="<%=countrycode%>" selected><%=country%></option>                                 <% }else{ %>                                 <option value="<%=code%>"><%=country%></option>                                 <%                                 }                         }                     } else {                         if(validationfailed!=null){                             if(validationfailed.equals("true")){                                 if( countryidonfailedvalidationint == code ){                                     %>                                     <option value="<%=countryidonfailedvalidationint%>" selected><%=country%></option>                                     <% }else{ %>                                     <option value="<%=code%>"><%=country%></option>                                     <%                                 }                             }                         } else { %>                             <option value="<%=code%>"><%=country%></option>                     <%  }                     }                 }                %>         </select>         </td>     </tr>            <tr>         <th>state</th>         <td>             <div id="loaddistrict">                    <select name="statelist" id="statelistenglish">                 <%if(statecode!=0){                     if(validationfailed!=null){                         if(validationfailed.equals("true")){                             while (rs7.next()) {                                 int codestate = rs7.getint("stateid");                                 string statename = rs7.getstring("name");                                 if(stateidonfailedvalidationint == codestate){                                     %>                                                   <option value="<%=stateidonfailedvalidationint%>" selected><%=statename%></option>                                     <%      } else {%>                                             <option value="<%=codestate%>"><%=statename%></option>                                       <%      }                             }                            }                        } else {                         while (rs6.next()) {                             int codestate = rs6.getint("stateid");                             string statename = rs6.getstring("name");                             if( codestate == statecode ){                     %>          <option value="<%=statecode%>" selected><%=statename%></option>                      <%      }else{%>                                 <option value="<%=codestate%>"><%=statename%></option>                     <%      }                         }                     }                 } else if(statecode==0){                 %>                 <option value="none">--select state--</option>                 <%                       while (rs7.next()) {                         int codestate = rs7.getint("stateid");                         string statename = rs7.getstring("name");                         if(validationfailed.equals("true")){                             if(stateidonfailedvalidationint == codestate){                     %>                                   <option value="<%=stateidonfailedvalidationint%>" selected><%=statename%></option>                     <%      } else {%>                             <option value="<%=codestate%>"><%=statename%></option>                       <%      }                          }                     }                  }                                %>                  </select>             </div>          </td>     </tr>     <tr>         <th>city<span style='color: #ff0000; display: inline;'>*</span></th>         <td><aui:input inlinefield="true" label="" name="city" size="45" value="<%=city %>"/></td>     </tr>     <tr>         <th>zip</th>         <td><aui:input inlinefield="true" label="" name="zip" size="45" value="<%=zipcode %>"/><span id="errmsg1"></span></td>     </tr>     <tr>         <th>skype id</th>         <td><aui:input inlinefield="true" label="" name="skypeid" size="45" value="<%=skypeid %>"/></td>     </tr>     <tr>         <th>twitter</th>         <td><aui:input inlinefield="true" label="" name="twitter" size="45" value="<%=twitter %>"/></td>     </tr>     <tr>         <th>primary phone<span style='color: #ff0000; display: inline;'>*</span></th>         <td><aui:input inlinefield="true" label="" name="primaryphone" size="45" value="<%=primaryphone %>"/><span id="errmsg2"></span></td>     </tr>     <tr>         <th>secondary phone</th>         <td><aui:input inlinefield="true" label="" name="secondaryphone" size="45" value="<%=secondaryphone %>"/><span id="errmsg3"></span></td>     </tr> </table>         <br>     <table>     <tr>         <td align="center">             <aui:button type="submit" name="submit" value="save , continue" style="width: 160px"></aui:button>         </td>            <td>             <aui:button type="submit" name="submit" value="close" style="width: 160px" onclick="hideform();"></aui:button>         </td>        </tr> </table> <aui:input type="hidden" name="redirecturl" value="<%= renderresponse.createrenderurl().tostring() %>"/>     

now need want show content of contenttoshow div when values of address1, address2, city, primary phone null. how achieve that? please help.