Forums Scripts & Popups is alias ?

i was wondering if theres a way to see if some text is an alias, eg;

if( $1- isalias )

or

if($alias(aliasinhere))

or somthing.

thanks in advance

ok
try this
$isalias(your-alias)
example $isalias(j)
if the alias is exist in your remote,it will return $true