Run two functions with Ajax calls sequentially

Question

I have two functions which has ajax calls inside them.

function a(){
    ajaxCall_A();
}
function b(){
    ajaxCall_B();
}

And I

Answer 1

You need to synchronize both of them using a semaphore

function c(){
    $semaphore=true;
    a();
    while($semaphore ) { 
         setTimeout("checksemaphore()", 500);
    } 
    b();
    // expectation : function 'b' will get executed only after function 'a' finished it's execution  
}


inside the ajax call to a
add a complete: 

complete : function(result) { 
            $waitsemaphore= 0 ; },
error: function(result) {alert("AJAX completed w/error");alert(result);},