javascript - $.post jQuery work only when alert inside post function -

my button :

<button type="submit" name="submit" class="btn-primary btn-block"           id="submit">login</button> 

and form :

<form action="b.php" method="post" id="formid" onsubmit="return post();"> 

and js function :

function post() {      var cvs = $('#client-nbr').val();   var cs = $('#cs').val();   $.post('a.php',{postcvs:cvs,postch1:cs});   alert("post function work");   } 

my problem is: when remove alert post() function, doesn't post a.php, , when use return false inside post() function, function works on a.php page freezes , can't data b.php!

given want asynchronous $.post complete before submitting form, need to:

• prevent submit executing immediately, returning false in post function
• add success callback $.post call, in manually submit form. sure not trigger submit via jquery (using .trigger('submit') or .submit() on jquery object). cause infinite loop, trigger post function again. instead, use get(0) raw dom element , use submit form, seen below.

try this:

function post() {     var cvs = $('#client-nbr').val();     var cs = $('#cs').val();     $.post('a.php',{postcvs:cvs,postch1:cs}, function() {         //manually submit form         $('#formid').get(0).submit()     });     return false; } 

for more information adding callbacks $.post, see https://api.jquery.com/jquery.post/