function changepic1() { 
document.images["accueil"].src="imgs/btn-accueil-on.jpg" 
}
function restorepic1() { 
document.images["accueil"].src="imgs/btn-accueil.jpg"
}

function changepic2() {
document.images["news"].src="imgs/btn-news-on.jpg"
}
function restorepic2() { 
document.images["news"].src="imgs/btn-news.jpg"
}

function changepic3() {
document.images["dossiers"].src="imgs/btn-dossiers-on.jpg"
}
function restorepic3() { 
document.images["dossiers"].src="imgs/btn-dossiers.jpg"
}

function changepic4() {
document.images["tech"].src="imgs/btn-tech-on.jpg"
}
function restorepic4() { 
document.images["tech"].src="imgs/btn-tech.jpg"
}

function changepic5() {
document.images["abo"].src="imgs/btn-abo-on.jpg"
}
function restorepic5() { 
document.images["abo"].src="imgs/btn-abo.jpg"
}

function changepic6() {
document.images["green"].src="imgs/btn-green-on.jpg"
}
function restorepic6() { 
document.images["green"].src="imgs/btn-green.jpg"
}

function changepic7() {
document.images["brico"].src="imgs/btn-brico-on.jpg"
}
function restorepic7() { 
document.images["brico"].src="imgs/btn-brico.jpg"
}

function changepic8() {
document.images["contact"].src="imgs/btn-contact-on.jpg"
}
function restorepic8() { 
document.images["contact"].src="imgs/btn-contact.jpg"
}