function generate_fields ( inform ) {
  var thisbag = inform.bagpick.options[inform.bagpick.selectedIndex].value;
  var thisboot = inform.bootpick.options[inform.bootpick.selectedIndex].value;
  var sku       = '';
  
	if (thisbag != '') {
		sku = thisbag +' :1,';
		if (thisboot != '' || thisboot != 'none') {
			sku += thisboot + ':1,';
		}
	}
	
  inform.ProdList.value = sku;
}

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

// NB: secondary conditional statements below are due to NN 4.x hack
 if ( inform.bagpick.options[inform.bagpick.selectedIndex].value == '') { errmsg += 'Please Select a Backpack Model before trying to purchase.'; }

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