This one liner jQuery snippet will force your browser to go to the top of your page:
1.$( 'html, body' ).animate( { scrollTop: 0 }, 0 );
If you want to add some smooth scrolling:
1.$( 'html, body' ).animate( { scrollTop: 0 }, 'slow'
$("h3").click(function(){   
          $(‘html, body’).animate({ scrollTop: 0 }, ‘slow’);    
})