如何使用javascript防止弹出窗口？

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?

Answer 1

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

How to block pop-up coming from iframe?

Answer 2

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

Two options...

1. Avoid iframing sites that have popups.
2. 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.

Answer 3

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">