How to prevent popup using javascript?

Question

Is there anyway I can use javascript to block popup from another website (iframe)?

Example: I have a website, which iframe to several other sites. One of them has a popup script like this:

<script type="text/javascript">
var popunder=new Array()
popunder[0]="http://www.target.com"

//Specify the width and height of new popunder window (in pixels).
var width = '700'; 
var height = '450';

//these are obvious variables. set "yes" or "no".
var p = 'scrollbars=yes, resizable=yes, toolbar=yes,' + 'menubar=yes, status=yes, location=yes, left=85, top=20, height=' + height + ',width=' + width;

// Load new PopUnder only once per browser session? (0=no, 1=yes)
// Putting 0 will cause the Popunder to load every time page is loaded
// Specifying 1 will cause it to load only once per session
var one_time=0

// That's it! Don't edit the code below unless you're really good. :-P //

function get_cookie(Name) {
  var search = Name + "="
  var returnvalue = "";
  if (document.cookie.length > 0) {
    offset = document.cookie.indexOf(search)
    if (offset != -1) { // if the cookie exists
      offset += search.length
      //set the index of beginning value
      end = document.cookie.indexOf(";", offset);

    if (end == -1) // set the index of the end of cookie value
         end = document.cookie.length;
         returnvalue = unescape(document.cookie.substring(offset, end))
      }
   }
  return returnvalue;
}

function loadornot(){
if (get_cookie('popunder')==''){
load_pop_power()
document.cookie="popunder=yes"
}
}

function load_pop_power(){
win2 = window.open(popunder[Math.floor(Math.random()*(popunder.length))], "bw", p)
win2.blur()
window.focus()
}

if (one_time==0)
load_pop_power()
else
loadornot()
</script>

Provide that this popup cannot be block and user have a low security setting on firefox or IE.

I have the ff. iframe on the site: (iframe.php)

<iframe src="http://friend.com/pop.php"></iframe>

What should i do on the iframe.php page to prevent popup?

Community · Accepted Answer · 2017-05-23 11:52:50Z

1

Its not possible. wdm is right. but a more detailed answer is provided here.

How to block pop-up coming from iframe?

edited May 23, 2017 at 11:52

CommunityBot

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answered Apr 18, 2011 at 5:24

Farzin Zaker

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2 Comments

DucDigital Over a year ago

Can we XSS into the site? Or is it possible to detect only? i can use a script to remove the iframe if detected

Farzin Zaker Over a year ago

Sorry, I never did this and I can not find solution for even detecting popup from javascript. you can find modal windows opened in an iframe, but there is no way to find normal windows opened by an iframe in javascript. the only way to detect is using browser addon!

wdm · Accepted Answer · 2011-04-18 05:19:48Z

1

I'm pretty sure what you're trying to do is not possible.

Two options...

Avoid iframing sites that have popups.
Ask them if they'll remove the popup or create a special landing page for you. If you are affiliated with them somehow they may help you out.

answered Apr 18, 2011 at 5:19

wdm

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Comments

Abdulbasit · Accepted Answer · 2020-04-10 16:13:28Z

0

No, I do not agree with others, html5 has a sandbox attribute which controls what is seen or what actions can be done through the iframe.

just add the following attribute in your Iframe and it should block the pop-ups "sandbox="allow-scripts allow-forms allow-same-origin""

eg <iframe src="source of your iframe" sandbox="allow-scripts allow-forms allow-same-origin">

answered Apr 10, 2020 at 16:13

Abdulbasit

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