if (!$('#course-detail-modal').is(':visible')) { window.modalStack = []; } $('#course-detail-modal').modal('hide'); $('#course-detail-modal').remove(); window.modalStack.push({ 'title': 'ECO 610', 'url': '/zapps/CourseCatalog/CourseDetail/2017/010?CoursePrefix=ECO&CourseNumber=610&CourseSection=401' }); $('body').append('