var ns = (navigator.appName=="Netscape" && parseInt(navigator.appVersion)>=4)?true:false
var ie = (navigator.appName=="Microsoft Internet Explorer" && parseInt(navigator.appVersion)>=4)?true:false
var ns6 = (document.getElementById&&!document.all)

var safari = new String(navigator.appVersion);
var expr=/safari/gi;
Saf = safari.search(expr);

var navigsaf = (Saf!=-1)?true:false;

function getLayer(name) {
  if (ie)
    return eval('document.all.' + name);
	if (ns6)
		return document.getElementById(name);
  return null;
}

function menuselect(menu){
	menulayer=getLayer(menu);
	menulayer.className="done";
}

function getHeight(){
	if(ns6) haut=window.innerHeight;
	else if (ie  && navigator.appVersion.indexOf("Macintosh") != -1) haut =document.body.offsetHeight+5;
	else haut = document.documentElement.clientHeight;

	return haut;
}


function etire(layer1,layer2){
	div1=getLayer(layer1);
	div2=getLayer(layer2);
  divfoot=getLayer('footer');
  haut=getHeight();

  if(ns6) foot=divfoot.offsetHeight*2;
  else foot=divfoot.offsetHeight;

	if(div1.offsetHeight+divfoot.offsetHeight<haut){
    div2.style.height = div2.offsetHeight + (haut-div1.offsetHeight-foot) - 30 +"px";
	}


}