function changemoilaclasse(ref) {
r=document.getElementsByClassName("cathover");
for(i=0; i<r.length; i++) {
r[i].className = "catpahover";
}
ref.className="cathover";
ypos=window.pageYOffset;
setTimeout(scrollToLeTop,0);
}
function scrollToLeTop() {
window.scrollTo(0, ypos);
}
document.createElement("header");
document.createElement("footer");
document.createElement("section");
document.createElement("aside");
document.createElement("nav");
document.createElement("article");
document.createElement("figure");