var pic;

function flipz(pic){
  document.getElementById("imgintro").style.visibility="hidden";
  document.getElementById("img08").style.visibility="hidden";
  document.getElementById("img09").style.visibility="hidden";
  document.getElementById("img10").style.visibility="hidden";
  document.getElementById("img11").style.visibility="hidden";
  document.getElementById("img12").style.visibility="hidden";
  if(pic == 0){
  document.getElementById("img00").style.visibility="visible";
  document.getElementById("img01").style.visibility="hidden";
  document.getElementById("img02").style.visibility="hidden";
  document.getElementById("img03").style.visibility="hidden";
  document.getElementById("img04").style.visibility="hidden";
  document.getElementById("img05").style.visibility="hidden";
  document.getElementById("img06").style.visibility="hidden";
  document.getElementById("img07").style.visibility="hidden";
 }	
 if(pic == 1){
  document.getElementById("img00").style.visibility="hidden";
  document.getElementById("img01").style.visibility="visible";
  document.getElementById("img02").style.visibility="hidden";
  document.getElementById("img03").style.visibility="hidden";
  document.getElementById("img04").style.visibility="hidden";
  document.getElementById("img05").style.visibility="hidden";
  document.getElementById("img06").style.visibility="hidden";
  document.getElementById("img07").style.visibility="hidden";
  }	
 if(pic == 2){
  document.getElementById("img00").style.visibility="hidden";
  document.getElementById("img01").style.visibility="hidden";
  document.getElementById("img02").style.visibility="visible";
  document.getElementById("img03").style.visibility="hidden";
  document.getElementById("img04").style.visibility="hidden";
  document.getElementById("img05").style.visibility="hidden";
  document.getElementById("img06").style.visibility="hidden";
  document.getElementById("img07").style.visibility="hidden";
  }
 if(pic == 3){
  document.getElementById("img00").style.visibility="hidden";
  document.getElementById("img01").style.visibility="hidden";
  document.getElementById("img02").style.visibility="hidden";
  document.getElementById("img03").style.visibility="visible";
  document.getElementById("img04").style.visibility="hidden";
  document.getElementById("img05").style.visibility="hidden";
  document.getElementById("img06").style.visibility="hidden";
  document.getElementById("img07").style.visibility="hidden";
  }
 if(pic == 4){
  document.getElementById("img00").style.visibility="hidden";
  document.getElementById("img01").style.visibility="hidden";
  document.getElementById("img02").style.visibility="hidden";
  document.getElementById("img03").style.visibility="hidden";
  document.getElementById("img04").style.visibility="visible";
  document.getElementById("img05").style.visibility="hidden";
  document.getElementById("img06").style.visibility="hidden";
  document.getElementById("img07").style.visibility="hidden";
  }
 if(pic == 5){
  document.getElementById("img00").style.visibility="hidden";
  document.getElementById("img01").style.visibility="hidden";
  document.getElementById("img02").style.visibility="hidden";
  document.getElementById("img03").style.visibility="hidden";
  document.getElementById("img04").style.visibility="hidden";
  document.getElementById("img05").style.visibility="visible";
  document.getElementById("img06").style.visibility="hidden";
  document.getElementById("img07").style.visibility="hidden";
  }
 if(pic == 6){
  document.getElementById("img00").style.visibility="hidden";
  document.getElementById("img01").style.visibility="hidden";
  document.getElementById("img02").style.visibility="hidden";
  document.getElementById("img03").style.visibility="hidden";
  document.getElementById("img04").style.visibility="hidden";
  document.getElementById("img05").style.visibility="hidden";
  document.getElementById("img06").style.visibility="visible";
  document.getElementById("img07").style.visibility="hidden";
  }
 if(pic == 7){
  document.getElementById("img00").style.visibility="hidden";
  document.getElementById("img01").style.visibility="hidden";
  document.getElementById("img02").style.visibility="hidden";
  document.getElementById("img03").style.visibility="hidden";
  document.getElementById("img04").style.visibility="hidden";
  document.getElementById("img05").style.visibility="hidden";
  document.getElementById("img06").style.visibility="hidden";
  document.getElementById("img07").style.visibility="visible";
  }
 if(pic == 8){
  document.getElementById("img03").style.visibility="hidden";
  document.getElementById("img08").style.visibility="visible";
  }
 if(pic == 9){
  document.getElementById("img03").style.visibility="hidden";
  document.getElementById("img09").style.visibility="visible";
  }
 if(pic == 10){
  document.getElementById("img03").style.visibility="hidden";
  document.getElementById("img10").style.visibility="visible";
  }
 if(pic == 11){
  document.getElementById("img06").style.visibility="hidden";
  document.getElementById("img11").style.visibility="visible";
  }
 if(pic == 12){
  document.getElementById("img06").style.visibility="hidden";
  document.getElementById("img12").style.visibility="visible";
  }
}