// JavaScript Document

var lastObj = null;
function showhide(id){
if (document.getElementById){
obj = document.getElementById(id);
if (obj.style.display == "none"){
obj.style.display = "";
if(lastObj != null) 
lastObj.style.display = "none";
lastObj = obj;
} else {
obj.style.display = "none";
lastObj = null;
}
}
}