function set_data()
{
    var data = new Date();
    
    var  day = data.getDate(); 
    
    //alert (day);
            
    var mese = parseInt(data.getMonth())+1;
            
    
    if (day.toString().length == 1)
        day = '0'+day;
        
        
    if (mese.toString().length == 1)
        mese = '0'+ mese;
    
    
    var value_data = day + '/' + mese + '/' + data.getFullYear() + ' ' +                              
                     data.toLocaleTimeString();
                                 
    var div_d  = document.getElementById('div_data');        
    
    div_d.innerHTML = value_data;
}

setInterval(set_data,1000);