var isNav4 = (!document.all && document.layers);
var isNav6 = (!document.all && document.getElementById);
var isIE4 = (document.all && !document.getElementById);
var isIE5 = (document.all && document.getElementById);
var timer;

function interval (id) {
        clearTimeout(timer);
        timer = setTimeout('menuShow(\'' + id + '\')', 100);
}

function menuShow(id){
        menuHide(); div = "info_"+id;
        if(isNav4) document.layers[div].visibility="show";
        if(isNav6) document.getElementById(div).style.visibility="visible";
        if(isIE4 || isIE5) document.all[div].style.visibility="visible";
}

function menuHide(){
        obj = new Array('ilka', 'julien', 'jens', 'nils', 'bella', 'thomas')
        for(i=0; i<obj.length; i++){
                div = "info_"+obj[i];
                if(isNav4) document.layers[div].visibility="hide";
                if(isNav6) document.getElementById(div).style.visibility="hidden";
                if(isIE4 || isIE5) document.all[div].style.visibility="hidden";
        }
}