function generate_fields ( inform ) {
  var sku       = '';
  if (inform.Type.value == 'multi') {
  	sku = inform.ProdSku.options[inform.ProdSku.selectedIndex].value + ':1,';
  }
  else {
 	 sku = inform.ProdSku.value + ':1,';
  }
	
	
	if (inform.add_armband.checked == true) {
		
		sku += + inform.ArmbandSku.value + ':1,';
	}
  inform.ProdList.value = sku;
}

function handleform ( inform ) {
 var errmsg = '';
 
 if (inform.Type.value == 'multi') {
 	if ( inform.ProdSku.options[inform.ProdSku.selectedIndex].value == '') { errmsg += 'Please Select a Model before trying to purchase.'; }
  }

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