Page focus jumping

After a long sleepless night (I managed to get 90 minutes) I have managed to successfully install a working form with conditional logic inside a modal window. I am very pleased. However, whenever I move to the next page in the form the screen jumps down to focus the form at the very top of my screen. Is there anyway to prevent this? Please excuse my incessant questions..........

I have ajax turned on and I'm calling the form in the template however I am not sure if the call is correct for ajax use as it only has false declarations : ` <?php gravity_form_enqueue_scripts(5,true); ?>
<?php gravity_form(5, false, false); ?>`

I am happy for the focus to be on the form but I would like the form to remain centred in the screen. The benefit of having a multi page form means I don't have to cram all of that info into one long strip. when the form opens it is centred but jumps up as you progress, Is there any way I can just keep it right in the middle? I am trying to develop a web app and I want it to remain as simple as possible for the user.

Thankyou for your quick reply, it worked perfectly although for some reason my css has vanished & been replaced by something else. Is there a workaround?

I mean the css has changed, it is not formatted in the same style as it was before i changed the function call.

http://www.docsense.net/

click the large "let's get started button"

It is linked to gravforms.css but the style sheet is not being recognised now for some reason. I am going to check the paths haven't changed when I updated the plain page template.