Hello, please can you provide me the code as in this page http://demo.sonhlab.com/biz/js-plugins/openpanel/demo.php for my wordpress site?
I mean I need the div code "menu" for a sticky panel
The above demo is just HTML code and CSS. You can get it via "view page source" feature of your browser. However, if you want to add it into your WordPress site you need to modified your theme source code.
I think a simplier way to create a sticky menu is use a menu plugin to create sticky menus then you can add OpenPanel button into the menu. By this way, you don't need to change your theme source code.