function afficher(id, classe)
{
	var i=0;
	classNode = getElementsByClassName(document, "*", classe);
	while(i<classNode.length)
	{
		if(document.all){
			classNode[i].style.display='none';
		}
		else classNode[i].setAttribute('style','display: none;');
		i++;
	}
	
	if(document.all){
		document.getElementById(id).style.display='block';
	}
	else document.getElementById(id).setAttribute('style','display: block;');
}

function masquer(id)
{
	if(document.all){
		document.getElementById(id).style.display='none';
	}
	else document.getElementById(id).setAttribute('style','display: none;');
}

// Fonction pour récupérer les éléments d'une classe
function getElementsByClassName(oElm, strTagName, strClassName){
    var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    strClassName = strClassName.replace(/\-/g, "\\-");
    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
    var oElement;
    for(var i=0; i<arrElements.length; i++){
        oElement = arrElements[i];      
        if(oRegExp.test(oElement.className)){
            arrReturnElements.push(oElement);
        }   
    }
    return (arrReturnElements)
}

function menu_survol_aff(id){
	if(document.all){
		var elem = document.getElementById(id);
		elem.style.display='block';
	}
}

function menu_survol_masq(id){
	if(document.all){
		var elem = document.getElementById(id);
		elem.style.display='none';
	}
}