A ASP(Active Server Page) script block must begin with <% and end with %>. A ASP script block can appear anywhere in a .asp file.

The following is an example of a ASP script block:
<% my $class %> <% my $vars = $Request->ServerVariables() %> <% for (sort keys %{$vars}) { %> <% next unless /^HTTP_|^REQUEST_/ %> <% $class = ($class ne 'normal')? 'normal': 'alt' %> <tr class="<%=$class%>"> <td><%=$_%></td> <td><%=$vars->{$_}%></td> </tr> <% } %>