function displayAboutUs()
{
var x = getPos(document.getElementById('nav_aboutus')).x;
//alert(x);
document.getElementById('navmenu2').style.display='block';

document.getElementById('navmenu2').style.left=x+'px';
}

function hideAboutUs()
{
document.getElementById('navmenu2').style.display='none';

}

function getPos(el) {
    // yay readability
    for (var lx=0, ly=0;
         el != null;
         lx += el.offsetLeft, ly += el.offsetTop, el = el.offsetParent);
    return {x: lx,y: ly};
}