Passing form from iframe to parent with conditions

Question

I recently asked a similar question Close Colorbox iframe after form submit and then redirect parent page but have since changed direction a little so I thought best to create a new post.

I have an add to cart form inside of an iframe(both my parent and iframe reside on the same server/directory). On submit I would like to pass the form to a script on the parent page. the script will close the iframe(colorbox) window and submit the form, but there is one exception; I have two versions of my site, one for standard browsers which uses an iframe to display the the product, and a mobile site which directly opens the product page and works fine as-is. Both use the same database where the info is stored, which means the forms are always the same, So I need a conditional, something along the lines of if this page is in an iframe (pass form to script on parent for submission) else (submit form as-is) . I have found this snippet here on stackoverflow that I believe should work for the conditional:

if (top === self) { not in a frame } else { in a frame }

I have three different forms, each is on a separate product page:

The most basic:

<form name="add_cart" action="index.php?action=add" method="post" 
enctype="multipart/form-data">

<input type="hidden" name="quantity" value="1" /> 
<input type="hidden" name="products_id" value="1" /> 
<input type="hidden" name="id[1]" value="1" id="att-1-1" />
<input type="hidden" name="id[2]" value="2" id="att-2-2" /> 


<input class="cssButton button" type="submit" value="Add Product"/> 
</form>

Then one with multiple checkbox selections:

<form enctype="multipart/form-data" method="post" action="index.php?action=add" 
name="cart_quantity">

<input type="hidden" value="1" name="quantity">
<input type="hidden" value="3" name="products_id">

<input id="option-8-1" type="checkbox" value="1" name="id[8][1]">
<input id="option-8-2" type="checkbox" value="2" name="id[8][2]">
<input id="option-8-3" type="checkbox" value="3" name="id[8][3]">
<input id="option-8-4" type="checkbox" value="4" name="id[8][4]">

<input class="cssButton button" type="submit" value="Add Selected Items" >
</form>

And a third with a drop down selection for a single option:

<form enctype="multipart/form-data" method="post" action="index.php?action=add" name="cart_quantity">


<input type="hidden" name="quantity" value="1" />
<input type="hidden" name="products_id" value="3" />  
<input type="hidden" name="id[6]" value="9" id="att-6-9" /> 

<select name="id-7" id="options">
<option value="1">option 1</option>
<option value="2">option 2</option>
<option value="3">option 3</option>
<option value="4">option 4</option>
</select>

I'm looking for any help or guidance into getting this to work. While I have a better grip on javascript, Jquery would be fine, Anything is appreciated.

Answer 1

You don't need a conditional, just use javascript unobtrusively, ie if javascript is enabled, javascript stops (hijacks) the form submission, sends the form data to parent and closes the iframe - if javascript is not enabled, the form submits normally: eg with jQuery

<form id="my-form">
</form>

<script>
    function formSubmissionHandler(){
        // handle form submission
    }

    $(document).ready(function(){
        $('#my-form').submit(function(){
            formSubmissionHandler();
            return false;
        });
    });
</script>

http://en.wikipedia.org/wiki/Unobtrusive_JavaScript