onreadystatechange is not called in firefox
Here are my codes.

my function to send ajax request and return a value:

    function myAjaxCall(){
       var myValue=0
       var async= false //I have to use synchronized request(otherwise my return value is 0)
       xmlhttp.open("GET",URL,async);
       
       xmlhttp.onreadystatechange=function(){
           ...
           myValue = SOMEVALUE;
       };
    
       xmlhttp.send();         
                
       return myValue
    }

 My other function will use the myAjaxCall function returned value

    function otherFunc(){
       var x= myAjaxCall();
    }

Things are working perfectly in this way except on **Firefox** browser, I know the reason is because in Firefox, if I use **synchronized** request, the `onreadystatechange` will not be called. 

In my case, however, I have to use **synchronized** ajax request, otherwise `myAjaxCall()` function returned value is always the initail value "`var myValue=0`".

How to get rid of this firefox problem??
onreadystatechange is not called in firefox
===

Here are my codes.

my function to send ajax request and return a value:

    function myAjaxCall(){
       var myValue=0
       var async= false //I have to use synchronized request(otherwise my return value is 0)
       xmlhttp.open("GET",URL,async);
       
       xmlhttp.onreadystatechange=function(){
           ...
           myValue = SOMEVALUE;
       };
    
       xmlhttp.send();         
                
       return myValue
    }

 My other function will use the myAjaxCall function returned value

    function otherFunc(){
       var x= myAjaxCall();
    }

Things are working perfectly in this way except on **Firefox** browser, I know the reason is because in Firefox, if I use **synchronized** request, the `onreadystatechange` will not be called. 

In my case, however, I have to use **synchronized** ajax request, otherwise `myAjaxCall()` function returned value is always the initail value "`var myValue=0`".

How to get rid of this firefox problem??