function toggleDisplay(Adiv) {
var myDiv = document.getElementById(Adiv);
var astring = myDiv.style.display;
var z1 = document.getElementById('z1');
var z2 = document.getElementById('z2');
var z3 = document.getElementById('z3');
var z4 = document.getElementById('z4');
if (Adiv=="z1") 
	{
	myDiv.style.display="inline";
	z2.style.display="none";
	}
if (Adiv=="z2") 
	{
	z1.style.display="none";
	myDiv.style.display="inline";
	}
}

function getCookieVal(offset){
var endstr=document.cookie.indexOf (";", offset);
if (endstr==-1) endstr=document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}

function LireCookie(nom){
var arg=nom+"=";
var alen=arg.length;
var clen=document.cookie.length;
var i=0;
while (i<clen)
{
var j=i+alen;
if (document.cookie.substring(i, j)==arg) return getCookieVal(j);
i=document.cookie.indexOf(" ",i)+1;
if (i==0) break;

}
return null;
}