function home(){
 document.getElementById('homepic').src = 'images/homer.jpg';
}


function about(){
document.getElementById('aboutpic').src = 'images/aboutr.jpg';
  
}

function contact(){
 document.getElementById('contactpic').src = 'images/contactr.jpg';
}


function calculator(){
document.getElementById('calculatorpic').src = 'images/calculatorr.jpg';
  
}

function franchise(){

  document.getElementById('franchisepic').src = 'images/franchiser.jpg';
}

function homeout(){
 document.getElementById('homepic').src = 'images/home.jpg';
}


function aboutout(){

  document.getElementById('aboutpic').src = 'images/about.jpg';
}

function contactout(){
 document.getElementById('contactpic').src = 'images/contact.jpg';
}


function calculatorout(){
document.getElementById('calculatorpic').src = 'images/calculator.jpg';
  
}

function franchiseout(){
document.getElementById('franchisepic').src = 'images/franchise.jpg';
  
}