gistfile1.txt

$('#insert_photo').submit(function()
      {
        
        var CKEDITOR = window.parent.CKEDITOR;
        var url = $('input:checked[name="img[size]"]').val();
        var class = $('input:checked[name="img[align]"]').val();
        var alt = $('#photo_alt').val();
        var img = '<img src="'+url+'" class="'+class+'" alt="'+alt+'" />';
        CKEDITOR.instances.article_body.insertHtml(img);
        window.parent.$.modal.close();
        return false;
      });