Toggle visibility of 2nd panel by clicking on first panel within dashboard

[spammenot66]

The code below has the drilldown setup to display panel4 when i click on panel3, and will only hide panel4 if i click on a link from panel4. How do I change it so that when i click on panel3 it will either show or hide panel4 depending on the state of panel4. For example if i click on panel3 and panel 4 is currently displaying, it will hide. If i click on panel3 again, it should now display the hidden panel4.

<row>
    <panel>
      <title>Panel 3  </title>
      <single>
        <search>
          <query>|gentimes start=-1 | eval temp="Panel 3" | table temp</query>
          <earliest>0</earliest>
          <latest></latest>
          <sampleRatio>1</sampleRatio>
        </search>
        <option name="drilldown">all</option>
        <drilldown>
          <condition match="boolPanel4 = true">           
                <set token="boolPanel4">true</set>
          </condition>
          <condition>               
                <unset token="boolPanel4"></unset>                
          </condition>            

        </drilldown>
      </single>
    </panel>
    <panel rejects="$boolPanel4$">
      <title>Panel 4</title>
      <single>
        <search>
          <query>|gentimes start=-1 | eval temp="Panel 4" | table temp</query>
          <earliest>0</earliest>
          <latest></latest>
          <sampleRatio>1</sampleRatio>
        </search>
        <option name="drilldown">all</option>
        <drilldown>          
          <set token="boolPanel4">true</set>
        </drilldown>
      </single>
    </panel>
  </row>

[Rmc06010]

Disregard my comment. This answer worked for me.

[Rmc06010]

Also looking to implement this functionality. As there are no answers yet I am leaning toward this being impossible. Can someone at least confirm whether this can be done or not?