function setPage(params)
{
   new Ajax.Updater('page', 'ajax/liste_bien.php', {asynchronous:false, evalScripts:true, parameters:params})
}

function setPageAge(params)
{
   new Ajax.Updater('page', 'ajax/liste_agence.php', {asynchronous:false, evalScripts:true, parameters:params})
}

function setMargin(div)
{
   var larg = screen.width;
   var haut = screen.height;

   var aLarg = screen.availWidth;
   var aHaut = screen.availHeight;

   var margin = (aLarg - div)/2 ;

   return margin;
}

function openAgence(age)
{
   //optention des données
   var params = 'age='+age;
   new Ajax.Updater('detail_agence_content', 'ajax/detail_agence.php', {asynchronous:false, evalScripts:true, parameters:params})

   //affichage de la div
   var marge_side = setMargin(500);
   document.getElementById('detail_agence_div').style.margin = '200px '+marge_side+'px';
   document.getElementById('detail_agence_div').style.display = 'block';
}

function closeAgence()
{
   document.getElementById('detail_agence_div').style.display = 'none';
}