I am trying to add multiple categories, but not working. One category is working.

THIS IS WORKING:

<%if ID = '270'%>
<%include include_error_page.html%>
<%else%>
<%include include_form.html%>
<%endif%>

THIS IS NOT WORKING:

<%if ID = '270','283','284','290'%>
<%include include_error_page.html%>
<%else%>
<%include include_form.html%>
<%endif%>

Why? Syntax wrong? thanks.