Change php via js, is it possible?

i want to change my headers dynamicly

<div id="Header_wrapper">

   <?php if( header_style == 'header-creative' ) get_template_part( 'includes/header', 'creative' ); ?>

   ///Header here///

   <?php } ?>

</div>

how i can create ajax function and change php in my Header_wrapper via js? please, guide me in the right direction.