22 lines
509 B
JavaScript
22 lines
509 B
JavaScript
|
let bouton;
|
||
|
|
window.onload = function() {
|
||
|
|
bouton = document.getElementById("haut");
|
||
|
|
bouton.style.display = "none";
|
||
|
|
}
|
||
|
|
|
||
|
|
window.onscroll= function() {descente()};
|
||
|
|
|
||
|
|
function descente(){
|
||
|
|
if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
|
||
|
|
bouton.style.display = "block";
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
bouton.style.display = "none";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function EnHaut(){
|
||
|
|
document.body.scrollTop = 0;
|
||
|
|
document.documentElement.scrollTop = 0;
|
||
|
|
bouton.style.display = "none";
|
||
|
|
}
|