function MM_findObj(n, d) { //v4.0
  var p,i,x; 
  
  if (!d) d=document;  
  if ((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document;
    n=n.substring(0,p);
   } 
  if(!(x=d[n])&&d.all) x=d.all[n];  
  for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];  
  for (i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);  
  if (!x && document.getElementById) x=document.getElementById(n);
  
  return x;
}

function show_hide(mylayer,state) {  
  if ((obj=MM_findObj(mylayer))!=null) {
    if (obj.style) {
		if ( state=='show' || state=='1' ) state = 'block';
		else state = 'none';
    }
    obj.style.display=state;
  }
}

function hide_all() {
	show_hide('menu_entreprise',0);
	show_hide('menu_methodes',0);	
	show_hide('menu_cadeaux',0);
	show_hide('menu_trouver_produits',0);
}

function Popup(UrlPage, LargeurPopup, HauteurPopup) {
	LargeurEcran = window.screen.availWidth;
	HauteurEcran = window.screen.availHeight;
	
	PositionX = parseInt(LargeurEcran / 2) - parseInt(LargeurPopup / 2);
	PositionY = parseInt(HauteurEcran / 2) - parseInt(HauteurPopup / 2);
	
	window.open(UrlPage, "lePopup", "scrollbars=yes,resizable=yes,width="+LargeurPopup+",height="+HauteurPopup+",top="+PositionY+",left="+PositionX);
}

<!--
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
//-->