在数据库中保存数据，不需要在php中重定向

I have a simple form, and I want to save the data in my database without redirection. I am using php, ajax and jquery for my page. I don't know if I did something wrong but after I hit the submit button the form data appears on the address bar. the data is stored in the database successfully but the page reloads as well. My code is given below.I have a simple form, and I want to save the da