Role para a página inicial

Controle a velocidade no final:

function scTt(){



var scrolltoTop = setInterval(function(){

var scrollY;
scrollY
= document.body.scrollTop;
scrollY
= document.documentElement.scrollTop;
scrollY
= window.pageYOffset;

var n;

if(scrollY >= 80){

n
= 15; // vitesse du scroll

}


//smoot arrivée
if(scrollY <= 80){

n
= 10;

}
//smoot arrivée
if(scrollY <= 50){

n
= 5;

}
//smoot arrivée
if(scrollY <= 30){

n
= 1;

}

var goSub = n++;


var substract = parseInt(scrollY)-(goSub);


window
.scrollBy(0,substract);

window
.scrollTo(0,substract);


if(scrollY == 0){
clearInterval
(scrolltoTop);
//alert('clear');
}


},1);





}