="Show Help" onclick="toggleHelp(this);" type="submit">
</div>
<div style="display: none;" id="help">
<img src="empty.png"> Enter a decimal value <i>d</i> into the threshold field and click "Apply"
to hide all nodes marked with time values lower than <i>d</i>.<br>
<img src="empty.png"> Click on "Expand All" for full tree expansion.<br>
<img src="empty.png"> Click on "Collapse All" to show only top level nodes.<br>
<img src="empty.png"> Use a, s, d, w as in Quake or Urban Terror to navigate the tree.<br>
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