function loadContent(id) {
    hideAll();
    document.getElementById(id).style.visibility = 'visible';
    document.getElementById(id).style.display = '';
}

function hideAll() { 
    var divs  = document.getElementsByTagName('div');
    for(i=0;i<divs.length;i++){ 
    if (divs[i].className == "hBlock") {
        divs[i].style.display = "none";
        divs[i].style.visibility = "hidden";
    } else  {
        if (document.layers) {
            document.divs[i].visibility = 'hidden';
            document.divs[i].style.display = "none"; 
        }
    } 
    }
}