function getElementsByClassName(classname, node)  {
    if(!node){node = document.getElementsByTagName("body")[0];}
    var a = [];
    var re = new RegExp('\\b' + classname + '\\b');
    var els = node.getElementsByTagName("*");
    var j=els.length;
    for(var i=0; i<j; i++){
        if(re.test(els[i].className)){a.push(els[i]);}
    }
    return a;
}



function expand(){
    var siteinfo = document.getElementById("siteinfo");
    var hidden = getElementsByClassName("hidden", siteinfo)[0];
    hidden.style.display = (hidden.style.display != 'block' ? 'block' : '' );
    
}