// JavaScript Document

function thumb1() {
 document.getElementById("photo1").style.display="block";
 document.getElementById("photo2").style.display="none";
 document.getElementById("photo3").style.display="none";
 document.getElementById("photo4").style.display="none"; 
 }

function thumb2() {
 document.getElementById("photo2").style.display="block";
 document.getElementById("photo1").style.display="none";
 document.getElementById("photo3").style.display="none";
 document.getElementById("photo4").style.display="none";
 }

function thumb3() {
  document.getElementById("photo3").style.display="block";
 document.getElementById("photo2").style.display="none";
 document.getElementById("photo1").style.display="none";
 document.getElementById("photo4").style.display="none";
 }

function thumb4() {
 document.getElementById("photo4").style.display="block";
 document.getElementById("photo2").style.display="none";
 document.getElementById("photo3").style.display="none";
 document.getElementById("photo1").style.display="none";
 }