(also the 'el' variable in your code is undefined.)
On Feb 11, 1:28 pm, saidbakr <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I think that my problem is complicated. I already done what you have
> told me due to the following requirement:
>
> I have another function used for doing form validation which I named
> it as formVal(). Inside formVal() I called avaChk() in a conditional
> if statement i.e.
> if (avaChk()){ ....
>
> I modified avaChk() by adding after alert('222) and alert('333')
> return false and return true respectively. Calling avaChk() leads only
> alert('111') and alert('444'). In other word avaChk() did not return
> true or false it just return the code outside $.ajax.
>
> You may notice that the code $.ajax is placed inside success handler.
> This is making me mad!!!
>
> Best regards,
> Said Bakr
>
> On Feb 11, 5:44 am, "Karl Rudd" <[EMAIL PROTECTED]> wrote:
>
> > It's a easy misunderstanding to have when you first begin to use AJAX.
>
> > Remember that the first 'A' in AJAX stands for "Asynchronous". You ask
> > the browser (via jQuery's ajax function) to retrieve a URL and you
> > give it a function that it will call with the result when it has
> > retrieved it.
>
> > The browser may take 50 milliseconds or 50 seconds to retrieve the
> > URL, you can't be sure how long.
>
> > In the mean time the browser (and your JavaScript function) continues
> > on its way.
>
> > So you must put all the code for handling the results in the "success"
> > (or "error") handler function.
>
> > Does that help?
>
> > Karl Rudd
>
> > On Feb 11, 2008 1:59 PM,saidbakr<[EMAIL PROTECTED]> wrote:
>
> > > Hi,
>
> > > I have very little knowledge about javascript. I used it with ordinary
> > > functions and the code of jquery may make me confused.
> > > I used it in a javascript function some thing like that:
>
> > > <script>
> > > function avaChk(lnk,id){
> > > alert('111')
> > > ob = document.getElementById('id');
> > > $.ajax({url: 'chk_user.php',type:'GET', data: id+'='+ el, cache:
> > > false, dataType: "script", success: function(data, textStatus){
> > > if (data == 0){
>
> > > alert('222');
> > > }
> > > else{
> > > alert('333');
> > > }
> > > },
> > > error: function(x,txt,err){
> > > $("#waitImg"+lnk).remove();
> > > alert('Could not check...'+"\n"+'The server may down or busy.
> > > Retry
> > > again after a while.');
> > > }
> > > });
> > > alert('444');
> > > }
>
> > > What I noticed is, when I call the function avaChk(), for me, very
> > > strange thing is happened. ;) I think the jQuery proffesional will
> > > know it:
>
> > > The alert sequence as I respect is 111, 222 or 333 then 444
> > > what happened is not like above, it was 111,444, 222 or 333 !!!
>
> > > I respected that the jQuery code should be executed before the
> > > alert(444). In real world this prevent me from using the value of data
> > > or return it through another function.
>
> > > What's wrong in my understanding and how can I overcome this problem?-
> > > Hide quoted text -
>
> > - Show quoted text -
