function affichage_popup(nom_de_la_page, nom_interne_de_la_fenetre)
{
   window.open (nom_de_la_page, nom_interne_de_la_fenetre, config='height=700, width=600, toolbar=no, menubar=no, scrollbars=no, resizable=no, location=no, directories=no, status=no')
}
function changerImageEnvoyee(photo)
{
    var xhr_object = null; 
    if(window.XMLHttpRequest) xhr_object = new XMLHttpRequest(); 
    else if(window.ActiveXObject)  xhr_object = new ActiveXObject("Microsoft.XMLHTTP"); 
    else {  document.getElementById('photo').innerHTML = "Votre navigateur ne supporte pas les objets XMLHTTPRequest... "; return; }
    xhr_object.open("GET", "/admin/voir_image.php?image="+photo, true);
    xhr_object.onreadystatechange = function()
	{
        if(xhr_object.readyState == 4) document.getElementById('image_js').innerHTML = xhr_object.responseText;  
    }
    xhr_object.send(null);	
}