<boxswitchurl boxID/>

The tag returns the URL which switches on and off the selected box. Select the box id from padmin>interface>defining boxes.

Example: <a href="<boxswitchurl 1234/>">toggle my box</a>

Custom boxes can be created only from text facts. 
You can use this tag only in html mode and at the very beginning of the html text you should type <advancedparser/>!