if (!$('#course-detail-modal').is(':visible')) { window.modalStack = []; } $('#course-detail-modal').modal('hide'); $('#course-detail-modal').remove(); window.modalStack.push({ 'title': 'ME 526', 'url': '/zapps/CourseCatalog/CourseDetail/2018/030?CoursePrefix=ME&CourseNumber=526' }); $('body').append('