navigation to a field problem

I find that navigation scripts to a field is very limited in control. If the button script is any where below the field you like to navigate back to,when you click on the button then that field appears as the first line at the top of the page, not in the center of the page. Likewise when your button is above the intended field, when you click on the button to navigate to that field it appears at the last line at the bottom of the page. Normal thinking or navigation on this should be that you end up with that intended field somewhere in the center of the page/layout your viewing. Please tell me if my thinking is flawed here? Or if I am missing something?