// JavaScript Document


// toggle visibility 

currentId = "photo1";

function toggle( targetId ){
if (currentId != "") { 
	document.getElementById(currentId).style.display = "none"; 
	}
currentId = targetId;	
  if (document.getElementById){
  		target = document.getElementById( targetId );
  			if (target.style.display == "none"){
  				target.style.display = "";
  			} else {
  				target.style.display = "none";
  			}
  	}
}