Display filename for custom file upload button

gistfile1.txt

//For updating displayed file name for form file upload inputs - Requires jQuery
				$('input[type="file"]').on('change', function(e) {
					var fileSelect = e.target,
						fileName = e.target.value.split(/\\|\//).pop(),
						fileNameTruncated = fileName.length > 20 ? fileName.substr(0, 20) : fileName,
						fileNameDisplay = fileSelect.dataset.displayfilename;
					$("."+fileNameDisplay).html(fileNameTruncated+"..."+fileName.substr(fileName.length - 4));
					
				});