function MM_showHideLayers() { //v9.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) 
  with (document) if (getElementById && ((obj=getElementById(args[i]))!=null)) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function food_health()
{
document.getElementById('food_health').className = 'current';
document.getElementById('call_us').className = 'none';
}
function call_us()
{
document.getElementById('food_health').className = 'none';
document.getElementById('call_us').className = 'current';
}