document.getByName = document.getElementsByName;
document.getElementsByName=function(name,tag) {
    var results=null;
    tag=(tag)?tag:"*";
    if (document.all) {
       results=new Array();
       var all=document.getElementsByTagName(tag);
       for (var i=0; i<all.length; i++) {
           if (all[i].name==name) { results.push(all[i]); }
       }
    } else {
       var all = document.getByName(name);
       if (tag != "*") { 
          results=new Array();
          for (var i=0; i<all.length; i++) {
              if (all[i].tagName.toLowerCase() == tag.toLowerCase()) {
                  results.push(all[i]);
              }
          }
       } else {results=all;}
    }
    return results;
}
function larg(){
if (document.body) var largeur = (document.body.clientWidth);
else var largeur = (window.innerWidth);
return largeur;
}
function masquer(){
        var nb_balises = document.getElementsByName('ville','div').length;
	for(i=0; i<=nb_balises-1; i++){
		document.getElementsByName('ville','div')[i].style.display='none';
	}
	var pub = document.getElementById('div_pub');
	pub.style.display = "none";
} 
function afficher(info,gauche,haut){
        var tooltip = document.getElementById(info);
	var pub = document.getElementById('div_pub');
	var largeur=larg();
	masquer();
	largeur = largeur/2;
	haut += 160;
	haut_pub = haut + 200;
	haut_pub += "px";
	haut += "px";
	gauche = largeur - 490 + gauche + 180;
	gauche += "px";
	tooltip.style.display = "block";
	tooltip.style.position="absolute";
	tooltip.style.top=haut;
	tooltip.style.left=gauche;

	pub.style.display = "block";
	pub.style.position="absolute";
	pub.style.top=haut_pub;
	pub.style.left=gauche;
	run= true ;
}