Why none of the plugins that have ajax doesn’t work in my website?

Taking a look at your code, I noticed one huge issue (also pointed out by Milo). Your script tags (the ones that pull in jQuery and other scripts) are wrong.

For example, this:

<script data-djssrc="http://2barnamenevis.com/wp-content/themes/mediaflux2/js/jquery.min.js" type="text/djs"></script>
<script data-djssrc="http://2barnamenevis.com/wp-content/themes/mediaflux2/js/jquery.nivo.slider.js" type="text/djs"></script>
<script data-djssrc="http://2barnamenevis.com/wp-content/themes/mediaflux2/js/mediaflux.js" type="text/djs"></script>

Should really be this:

<script src="http://2barnamenevis.com/wp-content/themes/mediaflux2/js/jquery.min.js" type="javascript"></script>
<script src="http://2barnamenevis.com/wp-content/themes/mediaflux2/js/jquery.nivo.slider.js" type="javascript"></script>
<script src="http://2barnamenevis.com/wp-content/themes/mediaflux2/js/mediaflux.js" type="javascript"></script>

I did some quick Googling to see if I could find out what was causing this. I found some references on the WordPress.org support forums to a pre-beta feature of CloudFlare causing this issue. Specifically:

Yep, turns out it was CloudFlare that was screwing me up. I just got off the phone with support and their explanation was that this feature [beta minify] “is not ready for implementation.” I’m still not sure why they have it as an option. FTW. Just disable that, wait about 30 minutes, and you should have your fancy javascript up and working again.

I looked further into your code, and it looks like you are, in fact using CloudFlare:

<script type="text/javascript">
//<![CDATA[
window.__CF=window.__CF||{};window.__CF.u="/cdn-cgi/async/cf/uri/";window.__CF.p="5e/f9847507c0fee91c0268427d3fde85";window.__CF.o=1;window.__CF.c=0;(function(){var a=document,b=a.createElement("script");b.src="https://ajax.cloudflare.com/cdn-cgi/nexp/v=918368360/cf_tools.min.js";b.setAttribute("async","true");a=a.getElementsByTagName("script");a=a[a.length-1];a.parentNode.insertBefore(b,a)})();
//]]>
</script></body>

So just follow the instructions from that forum post – turn off the “beta minify” feature and wait. This should turn your JavaScript files back to normal and let you use AJAX on your site.

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