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 changestyle(couche, style) {
    if (!(layer = MM_findObj(couche))) return;
    layer.style.display = style;
}
  
function changeclass(objet, myClass)    { 
    objet.className = myClass;
}
function displayHelp(aide) { 
    helpref = aide.href;
    helptarget = aide.target; 
    var win_opt="toolbar=0,location=0,directories=0,status=0,menubar=0,";
    win_opt += "scrollbars=1,resizable=1,copyhistory=0,";
    win_opt += "width=620" + ",height=250" ; 
    // Creation de la fenetre 
    NewWindow = window.open(helpref,helptarget,win_opt);
    NewWindow.focus(); 
    // Creation de la propriete creator permettant de referencer 
    // la fenetre source
    NewWindow.creator= self;
}