Scroll till top position is 0
$('html, body').animate({scrollTop:0}, 'slow');
Scroll till top position is 100
$('html, body').animate({scrollTop:100}, 'slow');
Scroll takes 2 seconds to complete
$('html, body').animate({scrollTop:100}, 2000);
Scroll till top position is 0
$('html, body').animate({scrollTop:0}, 'slow');
Scroll till top position is 100
$('html, body').animate({scrollTop:100}, 'slow');
Scroll takes 2 seconds to complete
$('html, body').animate({scrollTop:100}, 2000);