index.js

var path= "./public/img/a.gif";

var img=document.createElement('img');
img.setAttribute("src",path);
img.setAttribute("width","550");
img.setAttribute("height","309");

function imprimir() {
    document.getElementById("content").appendChild(img);
    document.getElementById("texto").innerHTML = "asd";
}

imprimir();

function ocultar(){
    document.getElementById("content").style.display="none";
}