No unfortunately it doesn't work at all, even on desktop.
I'm unable to open your form, just tried with Chrome and Firefox the latest i have no idea how it can work for you but it doesn't work for a normal visitor. Same javascript error after debugging it. So if you want to fix it you have to ask to JBusiness devs... as soon as the button is clicked the error is reported in the file
http://dakollabo.com/components/com_jbusinessdirectory/assets/js/jquery.blockUI.js
Below self explaining screenshot.
