function verifievide(objchamp,nbchar)
{
	var strchaine;
	strchaine = objchamp.value;
	if (strchaine.length < nbchar)
	{
		alert(''+ objchamp.name +' obligatoire.');
		objchamp.value='';
		objchamp.focus();
		return false;
	}
	else
	{
		return true;
	}
}
function verifall() {
	coderet = true;
	if (coderet) { coderet = verifievide(document.formu.Nom,3) };
	if (coderet) { coderet = verifievide(document.formu.Prenom,3) };
	if (coderet) { coderet = verifievide(document.formu.Telephone,10) };
	return coderet;
}
function openClose(id) {
    var obj = "";    
        // Check browser compatibility
    if(document.getElementById)
        obj = document.getElementById(id).style;
    else if(document.all)
        obj = document.all[id];
    else if(document.layers)
        obj = document.layers[id];
    else
        return 1;
    // Do the magic :)
    if(obj.display == "")
        obj.display = "none";
    else if(obj.display != "none")
        obj.display = "none";
    else
        obj.display = "block";
}