Selecting an element in iframe with jQuery

In our application, we parse a web page and load it into another page in an iframe. All the elements in that loaded page have their token IDs. I need to select the elements by those token IDs. Means - I click on an element on the main page and select corresponding element in the page in the iframe. With the help of jQuery I'm doing it in the following way:

function selectElement(token) {
     $('[tokenid=' + token + ']').addClass('border'); 
}

However with this function I can select the elements in the current page only, not in the iFrame. Could anybody tell me how can I select the elements in the loaded iFrame?

Thanks.

var iframe = $('iframe'); // or some other selector to get the iframe
$('[tokenid=' + token + ']', iframe.contents()).addClass('border');

Also note that if the src of this iframe is pointing to a different domain, due to security reasons, you will not be able to access the contents of this iframe in javascript.

Take a look at this post: http://praveenbattula.blogspot.com/2009/09/access-iframe-content-using-jquery.html

$("#iframeID").contents().find("[tokenid=" + token + "]").html();

Place your selector in the find method.

This may not be possible however if the iframe is not coming from your server. Other posts talk about permission denied errors.

jQuery/JavaScript: accessing contents of an iframe

when your document is ready that doesn't mean that your iframe is ready too,
so you should listen to the iframe load event then access your contents:

$(function() {
    $("#my-iframe").bind("load",function(){
        $(this).contents().find("[tokenid=" + token + "]").html();
    });
});