javascript:window.open

Hi,
I have to open an URL in a popup window when my form is submitted.
I have put a custom code into a sumit event :

<a href="javascript:window.open(MY_URL','_blank','height=700, width=900, toolbar=no, menubar=no, scrollbars=no, resizable=yes, location=no, directories=no, status=no');">
Validez vos informations</a>

MY_URL is opened in a popup window as expected but the form returns also a new page : javascript:window.open(MY_URL','_blank','height=700, width=900, toolbar=no, menubar=no, scrollbars=no, resizable=yes, location=no, directories=no, status=no
with [object Window]

What am I missing ?
Thanks for reply

Hi La Pache,

_blank is the instruction to open the URL in a new window - does that need to be different?

Bob

Thank you Bob for your reply.
Yes, a new popup window is opened as expected with _blank but a new page called by <a href...> is open under the popup.
My problem is how to just have the popup and redirect my page on a "thanks message" when I close my popup with a window.close ?
Marion

Hi Le Pache,

I'm sorry, but I don't understand what the problem is here? What do you mean when you say that the form displays a new page - that sounds normal to me. You'll get the form On Submit output displayed.

Bob

You are right, Bob. The problem is not the form that displays a new page (it does) but the custom code link in On submit event.
I have changed the <a href ...> with

<input type="button" class="btn btn-success" onClick="javascript:window.open('MY_URL','_blank','height=700, width=900, toolbar=no, menubar=no, scrollbars=no, resizable=yes, location=no, directories=no, status=no');" value="Validez vos informations">

Thank you for the explainations