function writediv(texte)
     {
     document.getElementById('pseudobox').innerHTML = texte;
     }

function verifPseudo(pseudo)
     {
     if(pseudo != '')
               {
               if(pseudo.length<4)
                         writediv('<span style="color:red"><b>'+pseudo+' :</b> ce pseudo est trop court</span>');
               else if(pseudo.length>30)
                         writediv('<span style="color:red"><b>'+pseudo+' :</b> ce pseudo est trop long</span>');
               else if(texte = file('verifpseudo.php?pseudo='+escape(pseudo)))
                         {
          if(texte == 1)
               writediv('<span style="color:red"><b>'+pseudo+' :</b> ce pseudo est deja pris</span>');
          else if(texte == 2)
               writediv('<span style="color:#00FF00"><b>'+pseudo+' :</b> ce pseudo est libre</span>');
          else
               writediv(texte);
                         }
               }

     }

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);
     }