About jquery inside onsubmit check form when using AJAX return false Invalid problem

In jquery, Ajax defaults to asynchronous behavior (the default setting for Async is true,) so when Ajax is successful, onsubmit is actually executed, so return false is not able to prevent OnSubmit's default behavior.

To solve the first to get Ajax asynchronous kill is to set the Async:false on the outside of Ajax set up a variable such as falg=true; write the IF (!) behind Ajax. FALG) {Reyurn false}

This can solve the Ajax inside Retyrn flase Invalid behavior

About jquery inside onsubmit check form when using AJAX return false Invalid problem