I have my own linked select form using my own Javascript and HTML. I use
static arrays for data. There is so much data that I would have to write
convert it to work with the data declarations that Manuels link- plugin
uses for example

$continents=array(
""=>"Select continent",
"na"=>"North America",
"eu"=>"Europe",
"sa"=>"South America",
"as"=>"Asia",
"oc"=>"Oceania"
);
$countries=array(
""=>array(
""=>"Select country",
),
"na"=>array(
""=>"Select country",
"us"=>"United States",
"ca"=>"Canada"
),

Is it relatively simple for me to write my own custom class so I could
use my own data?