$(document)
	.on('change', '.btn-file :file', function() {
		var input = $(this),
		numFiles = input.get(0).files ? input.get(0).files.length : 1,
		label = input.val().replace(/\\/g, '/').replace(/.*\//, '');
		input.trigger('fileselect', [numFiles, label]);
});

$(document).ready( function() {
	$('.btn-file :file').on('fileselect', function(event, numFiles, label) {

		var input = $(this).parents('.input-group').find(':text'),
			log = numFiles > 1 ? numFiles + ' files selected' : label;

		if( input.length ) {
			input.val(log);
		} else {
			if( log ) alert(log);
		}
	});
});