Graph generator<br>
		<form action='.' method='GET'>
<input type='hidden' name='graph' value='output'>
<label for="querystart">Start:</label>
<input type="datetime-local" id="querystart" name="querystart"> 
<label for="querystop">Stop:</label>
<input type="datetime-local" id="querystop" name="querystop"> 
<br>
<input type='submit' value='generate'>
</form>