javascript - bootstrap popover positioning - not working -

i have login , register link user can click , gets popover opened login. want popover bit shifted left hangs this:

i on 15' screen laptop, far fine. if open in bigger resolution, looks this:

i setting in js this:

$('#profilepover').on('shown.bs.popover', function(){    $('.popover').css('left','774px'); }); 

how can make stick login link no matter how big screen is?

instead of left use right:

$('#profilepover').on('shown.bs.popover', function(){    $('.popover').css({right: '115px', left: 'auto'}); }); 

right position not change window resize. of course 115px example, adjust actual layout. need reset left position auto in case because default popover left 0.