function setFooter() {
    //alert(document.body.offsetWidth);
    if (document.body.offsetWidth <= 980) {
        contentHeight = document.getElementById("content").offsetHeight;
        document.getElementById("footer").style.top = contentHeight + 74 + "px";
    } else {
        document.getElementById("footer").style.top = 1270 + "px";
    }
}