$(function() {
   if //Условие и т.д. тот скрипт.
});

$(function() {
   if //Условие и т.д. тот скрипт.
});

$(function() {
               if ($('.stlchek input:checked').length)
               {
               $(this).parents('.stlchek').css({backgroundColor: 'red'});
               }
            else
            {
               $(this).parents('.stlchek').css({backgroundColor: 'white'});
               }

            });

<form style="width: 400px;height: 400px;margin: 400px auto;">
            <div class="stlchek"><input type="checkbox" checked=""/></div>
            <div class="stlchek"><input type="checkbox"/></div>
        </form>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>
<script>
$(function() {
   $('.stlchek').css({backgroundColor: 'white'});
   $('.stlchek input:checked').each(function() {
      $(this).parents('.stlchek').css({backgroundColor: 'red'});
   });
});
</script>

<form>
            <div class="stlchek"><input type="checkbox" name="c" checked=""/></div>
            <div class="stlchek"><input type="checkbox" name="d" /></div>
        </form>