function apri(url) { 
          newin = window.open(url,'titolo','scrollbars=yes,resizable=no,width=500,height=400,status=no,location=no,toolbar=no');
} 

 

function validaModulo(reg){
 
  if (reg.user.value == "" || reg.user.value == "User"){
         alert("Nick name non valido");
         reg.user.focus();
         return false;
        }
  if (reg.pass.value == "" || reg.pass.value == "Password"){
         alert("Password non valido");
         reg.pass.focus();
         return false;
        }
    return true;
}



function changeColor(u){
 elem =  document.getElementById("i");
 elem.src = u;
}