Before IFRAME form is submitted, save the parent url to hidden field

Question

I show in iFrame my contact form (for leads). What I need to do is to save the parent url, then to insert this url to my hidden field before the form is submitted (or on the page load). I need to know from what url the form was submitted.

I have code that works only is chrome console. but when I put this code in the parent html the code is there but not working

jQuery(".gfiframe").contents().find("#gform_submit_button_1").click(function(){
    jQuery(".gfiframe").contents().find("#input_1_2").val('test');
});

To get the parent url I use

var $location = location.host;

Answer 1

location.host is relative to the iframe. Instead, use document.referrer jsFiddle Example

When the iframe's HTTP headers are sent, the parent to the iframe is sent as the referrer, therefore using document.referrer will result in the iframe's parent URL

Update: Within your iframe, not externally, use jQuery to add the parent url to the form being submitted

$('input.parent_url').val(document.referrer);