var category_groups = new Array ("1","19","Bituin","1","28","Wow Pinoy","1","27","World Pinoy","1","26","Tawag Pinoy","1","25","Wow Wow Wee","1","24","Pinoy Card","1","23","Call Mart","1","21","Da King","1","20","Chika Minutes","1","18","Bigatin","1","2","Akoy Pinoy","2","37","Pinoy Choice","2","38","Phil Max","2","35","Salamat Po","2","33","Galing Ng Pinoy","2","32","Pinoy Big Brother","2","30","Telesulit","2","29","Kabayan","3","40","Mega Deal Pilipinas","4","31","Super Philippines","4","45","Banana","4","39","Kumusta Pilipinas","4","5","Super Asia","4","8","Tipid Pinoy","4","36","Extra Philippines","4","34","Mega Philippines","4","46","777 International","5","44","PinoyPsychics.com");
function onCategoryChange(country, model) {
   var   countryCode = country.options[country.selectedIndex].value;
   var   i, j;

   model.options[0].value = '';
   model.options[0].text = '--Select Phone Card--';

   j = model.options.length = 1;
   model.options.selectedIndex = 0;

   for (i = 0; i < category_groups.length / 3; i++) {
      if (category_groups[i*3] == countryCode) {
         model.options.length = j+1;
         model.options[j].value = category_groups[i*3+1];
         model.options[j].text  = category_groups[i*3+2];
         j += 1;
      }
   }

   return;
}