Get URL from Iframe using Javascript

Hi,

I'll wanting to find a div (with ID) on the page then look for the Iframe inside that div. Once the iframe is found, to get the URL (src attr) and write this to the next button on the the page.

I seem to be having issues finding the iframe itselfs, can anyone give me some help with this.
Thanks.

<html>
<div id="nodeWrapper">
<iframe title="YouTube video player" width="400" height="280" src="http://www.youtube.com/embed/cWSdOIqrgXw?rel=0" frameborder="0" allowfullscreen></iframe> 

<a href="iframeurl">Link </a>

</div>

<div id="nodeWrapper">
<iframe title="YouTube video player" width="400" height="280" src="http://www.youtube.com/embed/cWSdOIqrgXw?rel=0" frameborder="0" allowfullscreen></iframe> 

<a href="iframeurl">Link </a>

</div>

<div id="nodeWrapper">
<iframe title="YouTube video player" width="400" height="280" src="http://www.youtube.com/embed/cWSdOIqrgXw?rel=0" frameborder="0" allowfullscreen></iframe> 

<a href="iframeurl">Link </a>

</div>



</html>

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<script type='text/javascript'> 
window.onload=init; 
function init()
{
 
  var o = document.getElementById("videoContent");
  var p = o.getElementsByTagName('iframe');
  if(p)
  {
    for( var i=0,limit=p.length; i < limit; ++i )
    {
      var URL;
      p[i].src = URL;
      //break;
      alert(URL);

      //split URL to get video ID
      //Add Video ID to next button with ID (button)
      // Do this for all 10 buttons on the page


    } 
  }
}
//--></script>

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Envision11Asked:
Who is Participating?
 
leakim971Connect With a Mentor PluritechnicianCommented:
line 7 :  var p = o.getElementsByTagName('iframe')[0];
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sjklein42Commented:
This will get you a little closer:

<script type='text/javascript'> 
window.onload=init; 
function init()
{
 
  var p = document.getElementsByTagName('iframe');
  if(p)
  {
    for( var i=0,limit=p.length; i < limit; ++i )
    {
      alert(p[i].src);


    } 
  }
}
//--></script>

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0
 
Envision11Author Commented:
Thanks for the comment, but this will return all iframes on the page. The code above works, but I need to find an iframe within a div not all iframes.
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leakim971PluritechnicianCommented:
var URL = o.getElementsByTagName('iframe')[0].src;
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Envision11Author Commented:
OK so I have changed the code to what has been suggested, this will only return the first iframe from the first div. How is it possible to find all the iframes with each div and return them to an array?

window.onload=init; 
function init()
{
  var o = document.getElementById("videoContent");
  for (var i = 0, limit = o.length; i < limit; ++i) {
    if (o) {
        var URL = o.getElementsByTagName('iframe')[0];
        alert(URL.src);

        //split URL to get video ID
        //Add Video ID to next button with ID (button)
        //Do this for all 10 buttons on the page
    }
  }
}

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0
 
leakim971Connect With a Mentor PluritechnicianCommented:
first use the << class >> attribute instead the << id >>
ID must be unique in a document.

<div class="nodeWrapper">

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window.onload=init; 
function init()
{
  var o = document.getElementsByTagName("div");
  for (var i = 0, i<o.length; i++) {
    if (o.className == "nodeWrapper" ) {
        var URL = o.getElementsByTagName('iframe')[0];
        alert(URL.src);

        //split URL to get video ID
        //Add Video ID to next button with ID (button)
        //Do this for all 10 buttons on the page
    }
  }
}

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0
 
Envision11Author Commented:
Ok so this is my working code, thanks for the help folks!

window.onload=init; 
function init()
{
  var o = document.getElementsByTagName("div");
  for (var i = 0; i<o.length; i++) {
    if (o[i].className == "videoContent" ) {
        var URL = o[i].getElementsByTagName('iframe')[0];
        alert(URL.src);
        
          
          
        //split URL to get video ID
        //Add Video ID to next button with ID (button)
        //Do this for all 10 buttons on the page
    }
  }
}

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0
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