function generate_fields ( inform ) {
  var sku       = '';

  
// a conditional H*A*C*K - array not worth the effort

	sku = '18817:1,';
		
	if (inform.add_h20audio.checked == true) {
		sku += '13326:1,';
	}

	if (inform.add_shufflearmband.checked == true) {
		sku += '13325:1,';
	}

  inform.ProdList.value = sku;
}

function handleform ( inform ) {
 var errmsg = '';

// NB: secondary conditional statements below are due to NN 4.x hack

 if ( errmsg ) { alert (errmsg); return false; }
 else { generate_fields( inform ); return true; }

}