Basic example

jsPanel.create({
    content:     '<textarea name="editor1" id="editor1"></textarea>',
    contentSize: '750 auto',
    headerTitle: 'jsPanel with CKEditor',
    position:    'center-top 0 100',
    theme:       '#8100BA',
    callback: function () {
        CKEDITOR.replace('editor1', {
            height: 300
        });
        $('#btn-1').attr('disabled', 'disabled');
        this.style.height = 'auto';
    },
    onclosed: function () {
        $('#btn-1').attr('disabled', false);
    }
});

Create panel