使用AJAX工作的JQuery加载程序:false

I'm a newcomer to the jquery planet and I have no idea how to solve my problem. I have read all the answers to similar questions but none of them work for me. I work on MAC OS X and therefore Safari with JQuery 2.1.1, but in the end my platform will be shared online and must be compatible with other browsers.I'm a newcomer to the jquery planet and I have