function hideAll(classname)
{
var alltags=document.all? document.all : document.getElementsByTagName("*")
for (i=0; i<alltags.length; i++){
if (alltags[i].className==classname)
alltags[i].className="hidden";
}
}

function change(id)
{
identity=document.getElementById(id);
if (identity.className=="hidden") identity.className="show";
    else identity.className="hidden";
}

function init()
{
    hideAll('show');
    location.href='#top';
}