<%ifnot...%> works just like <%if..%> except
<%if variable%> tests to see if there is the 'variable'.
<%ifnot variable%> test to see if the variable
doesn't exist. <%ifnot ...%> must end with a <%endif%>
like <%if...%> does.

Are there some more possibilities like
<if a eq 'x'> and <ifnot a eq 'x'>
whats with <= or 'and' + 'or'

Could i do:
<if a eq 'x'>
<if b eq 'x'>
then do
<endif>
<endif>

Robert