function hideItems() {
     var list = document.getElementById("dynamic").getElementsByTagName("div");
     for(i=0;i<list.length;i++) {
          list[i].style.display="none";
     }
}

function showItem(obj) {
   hideItems();
   var item = document.getElementById(obj);
	item.style.display="block";
}

function toggle(obj) {
   var item = document.getElementById(obj);
	if(item.style.display=="block") {
		hideItems();
	} else {
		showItem(obj);
	}
}