                       and ends with '#USERINPUT(END)'.
<li><b>ERROR</b>: text starting with the string 'ERROR' or 'WARNING'.
<li><b>COMMENT</b>: any other text
</ul>
All items (except for errors) can be edited by clicking on 
the first line of the item. 
The edited item opens a text area that can be modified and 
saved with the SAVE button. 
<p>
The sessions, sections and items can be manipulated with the following
buttons:
<ul>
<li><IMG SRC=button_remove.gif>: remove object. The removed
    object is move