Includes

Static Includes

Files can be included prior to execution with the @include command
e.g. 

<?@include "displayName.sjs"?>

Dynamic Includes

Include files can be passed parameters as well, which can be retrieved via getParameter calls in the include file. These dynamic parameters will override parameters in the URL.
e.g. 

<?@include "displayName.sjs?name=Jim"?>
Will result in 
Your name is Jim.
Variables may be passed to the @include command: 
<? var name = "Erin"; ?>
<?@include "displayName.sjs?name=<?=name?>"?>
Results in 
Your name is Erin.