Problem with Ajax submission?

Question

I am using Ajax to post data to the server(PHP code) and update it. i am posting many data one after the other, but in between the Ajax post fails and dont return a readyState to 4. the code is as follows

function getHttpRequest()
{
   var request=false;
   if(window.XMLHttpRequest)
   {
       request=new XMLHttpRequest();
   }
   else if(window.ActiveXObject)
   {
       try
       {
           request=new ActiveXObject("Msxml2.XMLHTTP");
       }
       catch(e)
       {
           try
           {
               request=new ActiveXObject("Microsoft.XMLHTTP");
           }
           catch(e)
           {
               request=false;
           }
       }
   }

   return request;
}

the code begins here..

function updateAnswer(){
var request=getHttpRequest();
request.open('post','addAnswer.php');
request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
request.send("answer="+ans);

if(request.readyState == 4)
{
    var response=request.responseText;
    document.getElementById("display").innerHTML=response;
}
}

i call this function to update answer in database but it donot return status=4 sometimes... please help

Any reason you are not using one of the thousand AJAX libraries around, which are proven to be robust? — RoToRa, May 26 '10 at 12:38
no reason as such... but it is a very small application, and i thought..i will code it in classic way... — Harish Kurup, May 26 '10 at 12:42

score 0 · Answer 1 · answered May 26 '10 at 12:37

0

innerinnerHTML should be innerHTML. updateAnswer gets called each time readyState is changing from zero to four. Four is fully loaded, while those lesser are different loading stages.

answered May 26 '10 at 12:37

Delan Azabani

79,602
28
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should i use readstatechange event and write the code in separate function (on success)?? – Harish Kurup May 26 '10 at 12:46
Yes. I didn't realise that you didn't attach `updateAnswer` to `onreadystatechange`. Do that first. – Delan Azabani May 26 '10 at 12:49

score 0 · Answer 2 · answered May 26 '10 at 12:37

0

Why not make life easier and use a framework like jQuery?

Also, can't you post all the data at once, in that way save a few roundtrips to the server?

answered May 26 '10 at 12:37

baloo

7,635
4
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Problem with Ajax submission?

2 Answers2