The code presented in this page can be used to detect if the visitor has an Ad-Blocker that blocks Ads in page, and to display a friendly message to visitor when the JavaScript is disabled or Ads are blocked.
The script was tested with Adblock Plus.
- Just add the following HTML /CSS /JS code in the pages of your website.
<style>
#jsad_notify{
background:#f8f800;
border:2px solid #0000be;
color:#ee0000;
font-size:20px;
font-weight:700;
margin:0;
padding:2px;
position:fixed;
top:40px;left:1%;right:1%;
text-align:center;
max-width:98vw;
}
</style>
<div id='jsad_notify'>
Parts of this site works with JavaScript enabled; and without AdBlock.<br>
Please consider supporting us by disabling your Ad-Blocker on this website.
</div>
<script>
//if JavaScript enabled, it hides #jsad_notify
var jsad_notify = document.querySelector('#jsad_notify');
jsad_notify.style.display ='none';
//adds a child-element in page which usually is blocked by Ad-Blocker
var test_adb = document.createElement('div');
test_adb.innerHTML =' ';
test_adb.className ='adsbox';
document.body.appendChild(test_adb);
window.setTimeout(function(){
//if Ads blocked it shows the message, else it removes the #jsad_notify
if(test_adb.offsetHeight ===0) jsad_notify.style.display ='block';
else jsad_notify.outerHTML ='';
document.body.removeChild(test_adb); //removes test_adb elm.
}, 700);
</script>
To change the position and design of the message, edit the CSS properties of the #jsad_notify element.
<object type="application/x-shockwave-flash" data="file.swf" width="500" height="250"> <param name="src" value="file.swf" /> Your browser not support SWF. </object>
input:focus {
background-color: #88fe88;
}var jsnstr = '{"url": "http://coursesweb.net/", "title": "Web Development Courses"}';
var obj = JSON.parse(jsnstr);
alert(obj.url);if (file_put_contents("file.txt", "content")) echo "The file was created";
else echo "The file can not be created";