//ajax
function writediv(divname, texte){
         //alert(divname+"\n"+texte);
         document.getElementById(divname).innerHTML = texte;
}

function verifData(url, sName, sTxt)
{
         if(sTxt != ''){
                   if(texte = file(url+'?zone='+escape(sTxt)))
                   {
                            writediv(sName, texte);
                   }
                   else
                            writediv(sName, '');
         } 
                   else
                            writediv(sName, '');
}

function file(fichier)
{
         if(window.XMLHttpRequest) // FIREFOX
                   xhr_object = new XMLHttpRequest();
         else if(window.ActiveXObject) // IE
                   xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
         else
                   return(false);
         xhr_object.open("GET", fichier, false);
         xhr_object.send(null);
         if(xhr_object.readyState == 4) return(xhr_object.responseText);
                   else return(false);
}

// fin ajax