yesterday i found this very useful jQuery-script on github:
https://gist.github.com/853841
jQuery.fn.scrollToViewPort = function(animTimeInterval) {
animTimeInterval = (typeof animTimeInterval == "undefined")?"slow":animTimeInterval;
return this.each(function(){
$('html,body').animate({scrollTop: $(this).offset().top},animTimeInterval);
});
}
it moves the users’ viewport to show the element that it has been called on.
I modified it somehow so that it will check now if the element is already in the viewport.
So we can avoid auto-scrolling in that case.
A offset Parameter has also been added in case we need some margin.
https://gist.github.com/1018842
jQuery.fn.scrollToViewPort = function(options) {
var animTimeInterval = (typeof options.interval == "undefined")?"slow":animTimeInterval;
return this.each(function(){
var offSet = (typeof options.offset == "undefined")? $(this).offset().top : options.offset;
if( $(this).offset().top <= $(window).scrollTop() || ( $(this).offset().top + $(this).height() ) >= ( $(window).scrollTop() + $(window).height() ) ){
$('html,body').animate( { scrollTop: offSet }, animTimeInterval );
}
});
}
usage:
$(this).scrollToViewPort( { offset : ( ( $(this).offset().top + my_custom_offset ) - $(window).height() ) } );