function changesub(name){
	var menuitems = new Array("home","vijver","planten","vissen","zwemvijver","overons");
	for(i=0;i<menuitems.length;i++){
   		var myitem = document.getElementById("sub_"+menuitems[i]);
   		if(menuitems[i]==name){
   			myitem.style.display="block";
   		}else{
   			myitem.style.display="none";
   		}
  	}
}

function menuselected(name){
	if(name!=null && name!=''){
		changesub(name);
		var myitem = document.getElementById("main_"+name);
		if (myitem) myitem.className="activated";
	}
}