ajax not working onreadystatechange function

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JavaScript

var xmlhttp; if(window.XMLHttpRequest) { xmlhttp=new XMLHttpRequest(); } xmlhttp.onreadystatechange=function() { if(xmlhttp.readyState==4 && xmlhttp.readyState==200) { alert(xmlhttp.responseText); } } xmlhttp.open(GET,"signupin.php",true); xmlhttp.send();

signupin.php

echo("hello");

the code should alert hello

where is the problem?

Posted 17-Aug-13 20:48pm

bhawin parkeria

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OriginalGriff 18-Aug-13 2:52am

Don't post a new question to add information - use the "Improve question" widget instead.

I have deleted the "Spare" version.

bhawin parkeria 18-Aug-13 3:17am

okk thanks for that, but can you solve my problem

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 18-Aug-13 12:08pm

Use debugger to check line by line what is really happening.

If you do that, you will definitely get the idea.

enhzflep 18-Aug-13 13:12pm

This can never equate to true..

if (xmlhttp.readyState==4 && xmlhttp.readyState==200)

How do you expect 1 variable to hold 2 values at once? We don't have quantum computers yet, you know!

bhawin parkeria 20-Aug-13 16:44pm

i didn't wrote this of my own , i copied it from w3schools.com and its working fine

only this time i got problem

enhzflep 20-Aug-13 23:59pm

Oh yes, really?

I googled for the line of your code that's a problem. The first search result gave me the below code:

xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
}
}

Notice the difference?!

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Jitendra Sabat · Accepted Answer · 2013-08-20T03:16:00

Don't go for conventional Ajax request.Try jquery ajax to accomplish this task.

include jquery.js library in your project from JQuery site
Then reference it on your used page
Now make an ajax call as below

JavaScript

$(document).ready(function(){
   $.ajax(function(){
     url:"signupin.php",
     mType:"GET",
     async:"true",
     success:function(){
       alert("Hello");
     }
   });
});

For reference please have a look at jquery documentation from below link
ajax call using JQuery
See the magic!Hope this will help you.