javascript - Fire iframe and submit form on the same button press -

spend few hours on 1 , couldn't find solution here goes:

i having tracking pixel in iframe. on button click want firstly fire tracking pixel , submit form. have page in middle fire pixel , pass form in project have no access backend , cannot make intermediate page. have tried add onclick='firepixel()' button assuming submit form , load iframe not. have tried create 2nd function , add callback in way: onclick(firepixel(submitform)) having submitform callback - no luck.

p.s have tried have button outside of form (as seen below) inside form - no luck.

not sure what's best practice here? don't mind if iframe being fired in background - user never seeing - it's tracking pixel.

please find code (which not work) below:

 <iframe id='conversioniframe' data-src="testframe.html"           src="about:blank" width='100px' height="100px"> <div class='panel clearfix'>     <form id="options-go-to-insurer" action="/life/buy/" method="post">         <!-- form stuff -->     </form>     <button id="conversionbutton" class="button primary expand apply-button" onclick="conversionfunction(submitform())"><b>apply now</b></button> </div>   <!-- stop --> <script>  function conversionfunction(callback) {     var iframe = $("#conversioniframe");     iframe.attr("src", iframe.data("src"));     callback(); }  function submitform() {     document.getelementbyid("options-go-to-insurer").submit(); } </script> 

note type="button" mandatory not submit form

if page , iframe code same domain, return

<script>parent.document.getelementbyid("options-go-to-insure‌​r").submit()</script‌​>

from testiframe.html

if not, try

$(function() {    $("#conversionbutton").on("click", function() { // when button clicked      var $tracker = $("#conversioniframe");      $tracker.attr("src", $tracker.data("src")); // load page    });    $("#conversioniframe").on("load", function() { // when page has loaded      $("#options-go-to-insurer").submit(); // submit form    });  });

<iframe id='conversioniframe' data-src="testframe.html" src="about:blank" width='100px' height="100px">    <div class='panel clearfix'>      <form id="options-go-to-insurer" action="/life/buy/" method="post">        <!-- form stuff -->      </form>      <button type="button" id="conversionbutton" class="button primary expand apply-button"><b>apply now</b>      </button>    </div>