anchor.diff:                                                  </span>
                               <a href="#" onclick="changeView('dataSourceArea');" class="icon-link"
                                  style="background-image: url(images/design-view.gif); font-weight: normal">
  -                                switch to upload configuration file for simulate</a>
  +                                switch to upload file for simulation</a>
                           </th>
                       </tr>
                       </thead>
  
positive.code: 
      org.wso2.carbon.event.simulator.stub.types.CSVFileInfoDto[] csvFileInfoDtosArray=stub.getAllCSVFileInfo();
      org.wso2.carbon.event.simulator.stub.types.DataSourceTableAndStreamInfoDto[] dataSourceTableAndStreamInfoDtoArray = stub.getAllDataSourceTableAndStreamInfo();
  %>
  
  <script type="text/javascript">
      jQuery(document).ready(function() {
          document.getElementById("fileArea").style.display = "inline";
          document.getElementById("dataSourceArea").style.display = "none";
          document.getElementById("fileRadioButton").checked = true;
      });
      function changeView(view) {
          var plain = "fileArea";
  
negative.code:     <div id="workArea">
      <h2><fmt:message key="event.stream.simulator"/> </h2>
      <br>
  
          <h4 style="color: #0D4d79"><fmt:message key="send.single.event"/> </h4>
  
          <div id="dataArea" style="display: inline;">
              <form name="eventStreams" id="eventStreams" method="post" >
                  <table id="eventStreamtable" class="styledLeft">
                      <thead>
                      <tr>
                          <th> </th>
                      </tr>
                      </thead>
                      <tbody>
                      <tr>
                          <td class="formRow">
                              <table id="inputEventDetailTable" class="normal-nopadding">
                                  <tbody>
                                  <tr>
                                      <td class="leftCol-med"><fmt:message key="select.the.event.stream"/> <span class="required">*</span></td>
                                      <td>
                                          <select name="EventStreamID" id="EventStreamID" onload="showEventProperties()"
                                                  onchange="showEventProperties()">
  
                                              <%
                                                  if (eventInfoArray == null) {
                                              %>
  
                                              <option value="No Event Stream Definitions"><fmt:message key="no.event.stream.definition"/>
                                              </option>
                                              <%
                                              } else {%>
  
                                                  <option value="select">select event stream
                                                  </option>
  
                                                  <%for (int i = 0; i < eventInfoArray.length; i++) {
                                                      String streamName = eventInfoArray[i].getStreamName();
                                                      String streamVersion = eventInfoArray[i].getStreamVersion();
                                                      if(streamId.equalsIgnoreCase(streamName + ":" + streamVersion)){%>
                                                          <option value="<%=eventInfoArray[i].getStreamName()%>" selected ><%=streamName+":"+streamVersion%>
                                                          </option>
                                                      <%}else{%>
                                                          <option value="<%=eventInfoArray[i].getStreamName()%>"><%=streamName+":"+streamVersion%>
                                                          </option>
                                                      <%}
                                                  }
                                                  if(!streamId.equalsIgnoreCase("")){%>
                                                      <script>
                                                          showEventProperties();
                                                      </script>
                                                  <%}
                                              }%>
                                          </select>
                                      </td>
                                  </tr>
                                  </tbody>
                              </table>
                          </td>
                      </tr>
                      <tr>
                          <td class="buttonRow">
                              <input type="button" value="Send"
                                     onclick="sendEvent(document.getElementById('eventStreams'))">
                          </td>
                      </tr>
                      </tbody>
                  </table>
  
              </form>
  
          </div>
  
          <br/>
          <h4 style="color: #0D4d79"><fmt:message key="send.multiple.events"/>
          </h4>
  
          <div id="fileArea">
              <form name="csvFileForm" id="csvFileForm" method="post" action="../../fileupload/csv" enctype="multipart/form-data"
                    target="_self"  >
  