gistfile1.js

$('#submitForm').click(function(event) {
    var total = 0;
    $('select.sandwich').each(function() {
      total = total + $(this).attr('value');
    });
    if(total < 10 ) {
      event.preventDefault();
      $('div.minRequired').css('display', 'block');
    } else {
      $('div.minRequired').css('display', 'none');
    }
  });