$(document).ready(function() {
var scrollHeight = 0;
$("div").click(function(event){
scrollHeight = scrollHeight + $(window).height();
$('html, body').animate({scrollTop: scrollHeight+'px'});
});
});
$(document).ready(function() {
var scrollHeight,winScroll,wihHeight;
scrollHeight = winScroll = wihHeight = 0;
$("div").click(function(event){
winScroll = $(window).scrollTop();
wihHeight = $(window).height();
scrollHeight = winScroll - winScroll % wihHeight + wihHeight;
$('html, body').animate({scrollTop: scrollHeight+'px'});
});
});