function update_menu(open){
document.getElementById('foodmax').style.display='none';
document.all.healthmax.style.display='none';
document.all.ecomax.style.display='none';
document.all.caremax.style.display='none';
document.all.petmax.style.display='none';
document.all.foodmin.style.display='block';
document.all.healthmin.style.display='block';
document.all.ecomin.style.display='block';
document.all.caremin.style.display='block';
document.all.petmin.style.display='block';
var clicked=open.substring(0,(open.length-3));
var active=open.substring((open.length-3),open.length);
var temp2= eval("document.getElementById('"+clicked+active+"').style");
temp2.display='none';
if(active=='min'){var newactive='max';}
else{var newactive='min';}
var temp= eval("document.getElementById('"+clicked+newactive+"').style");
temp.display='block';
}