var homepage = "index.php?article_id=1";

function toHomepage() {
    var elm;
    elm=document.getElementById('header');

    elm.style.cursor = "pointer";
    elm.setAttribute("title", "Schichwechsel - Link zur Startseite");
    
    if (elm.addEventListener) elm.addEventListener("click",home,false);
    else if (elm.attachEvent) elm.attachEvent("onclick",home);
}

function home() {
    document.location.href = homepage;
}

if (window.addEventListener) window.addEventListener("load",toHomepage,false);
else if (window.attachEvent) window.attachEvent("onload",toHomepage);