function image_taille(id)
 {   var bt=document.getElementById(id);
	 bt.style.width="36px";
	 bt.style.height="36px";
	 bt.style.marginTop="0px";
	 bt.style.marginLeft="0px";
 }

function reset_taille(id)
 {   var bt=document.getElementById(id);
	 bt.style.width="32px";
	 bt.style.height="32px";
	 bt.style.marginTop="4px";
	 bt.style.marginLeft="4px";
 }
  
function reset_all()
  {
	 document.getElementById('imag_accueil').style.marginTop="4px";
	 document.getElementById('imag_accueil').style.marginLeft="4px";
	 document.getElementById('imag_propo').style.marginTop="4px";
	 document.getElementById('imag_propo').style.marginLeft="4px";
	 document.getElementById('imag_90').style.marginTop="4px";
	 document.getElementById('imag_90').style.marginLeft="4px";
	 document.getElementById('imag_emploi').style.marginTop="4px";
	 document.getElementById('imag_emploi').style.marginLeft="4px";
	 document.getElementById('imag_presse').style.marginTop="4px";
	 document.getElementById('imag_presse').style.marginLeft="4px";
	 document.getElementById('imag_don').style.marginTop="4px";
	 document.getElementById('imag_don').style.marginLeft="4px";
	 document.getElementById('imag_contact').style.marginTop="4px";
	 document.getElementById('imag_contact').style.marginLeft="4px";
	 document.getElementById('imag_gloss').style.marginTop="4px";
	 document.getElementById('imag_gloss').style.marginLeft="4px";
  }